/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_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:08:43,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:08:43,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:08:43,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:08:43,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:08:43,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:08:43,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:08:43,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:08:43,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:08:43,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:08:43,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:08:43,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:08:43,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:08:43,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:08:43,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:08:43,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:08:43,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:08:43,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:08:43,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:08:43,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:08:43,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:08:43,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:08:43,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:08:43,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:08:43,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:08:43,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:08:43,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:08:43,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:08:43,146 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:08:43,159 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:08:43,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:08:43,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:08:43,161 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:08:43,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:08:43,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:08:43,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:08:43,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:08:43,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:08:43,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:08:43,163 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:08:43,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:08:43,163 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:08:43,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:08:43,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:08:43,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:08:43,164 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:08:43,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:08:43,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:08:43,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:08:43,164 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:08:43,165 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:08:43,165 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:08:43,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:08:43,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:08:43,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:08:43,561 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:08:43,561 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:08:43,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound2.c [2021-05-06 08:08:43,615 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c796c89ac/0ecbc532fdbe4dcf9d340fd38c63de3f/FLAG7d960bdb5 [2021-05-06 08:08:43,974 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:08:43,974 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound2.c [2021-05-06 08:08:43,980 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c796c89ac/0ecbc532fdbe4dcf9d340fd38c63de3f/FLAG7d960bdb5 [2021-05-06 08:08:43,997 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c796c89ac/0ecbc532fdbe4dcf9d340fd38c63de3f [2021-05-06 08:08:43,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:08:44,000 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:08:44,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:08:44,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:08:44,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:08:44,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:08:43" (1/1) ... [2021-05-06 08:08:44,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f80e606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:08:44, skipping insertion in model container [2021-05-06 08:08:44,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:08:43" (1/1) ... [2021-05-06 08:08:44,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:08:44,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:08:44,143 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_unwindbound2.c[489,502] [2021-05-06 08:08:44,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:08:44,228 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:08:44,246 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_unwindbound2.c[489,502] [2021-05-06 08:08:44,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:08:44,275 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:08:44,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:08:44 WrapperNode [2021-05-06 08:08:44,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:08:44,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:08:44,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:08:44,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:08:44,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:08:44" (1/1) ... [2021-05-06 08:08:44,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:08:44" (1/1) ... [2021-05-06 08:08:44,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:08:44" (1/1) ... [2021-05-06 08:08:44,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:08:44" (1/1) ... [2021-05-06 08:08:44,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:08:44" (1/1) ... [2021-05-06 08:08:44,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:08:44" (1/1) ... [2021-05-06 08:08:44,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:08:44" (1/1) ... [2021-05-06 08:08:44,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:08:44,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:08:44,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:08:44,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:08:44,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:08:44" (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 08:08:44,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:08:44,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:08:44,471 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:08:44,471 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:08:44,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:08:44,471 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:08:44,471 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:08:44,472 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:08:44,472 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:08:44,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:08:44,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:08:44,472 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:08:44,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:08:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:08:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:08:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:08:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:08:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:08:44,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:08:44,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:08:44,756 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:08:44,757 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:08:44,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:08:44 BoogieIcfgContainer [2021-05-06 08:08:44,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:08:44,758 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:08:44,758 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:08:44,759 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:08:44,761 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:08:44" (1/1) ... [2021-05-06 08:08:44,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:08:44 BasicIcfg [2021-05-06 08:08:44,788 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:08:44,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:08:44,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:08:44,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:08:44,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:08:43" (1/4) ... [2021-05-06 08:08:44,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d3395a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:08:44, skipping insertion in model container [2021-05-06 08:08:44,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:08:44" (2/4) ... [2021-05-06 08:08:44,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d3395a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:08:44, skipping insertion in model container [2021-05-06 08:08:44,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:08:44" (3/4) ... [2021-05-06 08:08:44,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d3395a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:08:44, skipping insertion in model container [2021-05-06 08:08:44,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:08:44" (4/4) ... [2021-05-06 08:08:44,794 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound2.cJordan [2021-05-06 08:08:44,799 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:08:44,803 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:08:44,815 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:08:44,835 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:08:44,836 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:08:44,836 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:08:44,836 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:08:44,836 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:08:44,836 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:08:44,837 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:08:44,837 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:08:44,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:08:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:08:44,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:44,856 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:44,857 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:44,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:44,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2051628946, now seen corresponding path program 1 times [2021-05-06 08:08:44,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:44,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702945486] [2021-05-06 08:08:44,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:45,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:08:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:45,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:08:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:45,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 08:08:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:08:45,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:45,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702945486] [2021-05-06 08:08:45,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702945486] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:08:45,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:08:45,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:08:45,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627303313] [2021-05-06 08:08:45,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:08:45,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:45,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:08:45,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:08:45,185 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:08:45,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:45,356 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-05-06 08:08:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:08:45,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-06 08:08:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:45,379 INFO L225 Difference]: With dead ends: 36 [2021-05-06 08:08:45,379 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 08:08:45,381 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:08:45,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 08:08:45,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-06 08:08:45,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:08:45,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-06 08:08:45,435 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-06 08:08:45,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:45,435 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-06 08:08:45,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:08:45,436 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-06 08:08:45,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:08:45,445 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:45,445 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:45,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:08:45,445 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:45,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:45,446 INFO L82 PathProgramCache]: Analyzing trace with hash -794581502, now seen corresponding path program 1 times [2021-05-06 08:08:45,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:45,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832712713] [2021-05-06 08:08:45,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:45,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:08:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:45,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:08:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:45,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 08:08:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:08:45,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:45,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832712713] [2021-05-06 08:08:45,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832712713] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:08:45,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:08:45,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:08:45,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016176084] [2021-05-06 08:08:45,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:08:45,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:45,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:08:45,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:08:45,717 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:08:45,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:45,864 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-05-06 08:08:45,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:08:45,864 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), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:08:45,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:45,866 INFO L225 Difference]: With dead ends: 32 [2021-05-06 08:08:45,866 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 08:08:45,867 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:08:45,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 08:08:45,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 08:08:45,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:08:45,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 08:08:45,879 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-06 08:08:45,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:45,880 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 08:08:45,880 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), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:08:45,882 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 08:08:45,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:08:45,883 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:45,883 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:45,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 08:08:45,888 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:45,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:45,888 INFO L82 PathProgramCache]: Analyzing trace with hash -793509026, now seen corresponding path program 1 times [2021-05-06 08:08:45,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:45,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697430307] [2021-05-06 08:08:45,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:45,917 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:45,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739210308] [2021-05-06 08:08:45,917 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 08:08:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:45,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:08:45,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:46,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:08:46,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:46,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697430307] [2021-05-06 08:08:46,198 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:46,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739210308] [2021-05-06 08:08:46,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739210308] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:08:46,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:08:46,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:08:46,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383334322] [2021-05-06 08:08:46,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:08:46,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:46,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:08:46,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:08:46,204 INFO L87 Difference]: Start difference. First operand 32 states and 41 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:08:46,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:46,288 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-05-06 08:08:46,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:08:46,288 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 08:08:46,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:46,290 INFO L225 Difference]: With dead ends: 47 [2021-05-06 08:08:46,290 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 08:08:46,290 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:08:46,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 08:08:46,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-06 08:08:46,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:08:46,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-05-06 08:08:46,302 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2021-05-06 08:08:46,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:46,303 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-05-06 08:08:46,303 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:08:46,303 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-05-06 08:08:46,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:08:46,305 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:46,305 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:46,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 08:08:46,523 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:46,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:46,523 INFO L82 PathProgramCache]: Analyzing trace with hash 2115229340, now seen corresponding path program 1 times [2021-05-06 08:08:46,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:46,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928591751] [2021-05-06 08:08:46,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:46,530 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:46,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743306757] [2021-05-06 08:08:46,530 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 08:08:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:46,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:08:46,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:46,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:46,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:46,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:46,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:46,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:08:46,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:46,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928591751] [2021-05-06 08:08:46,912 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:46,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743306757] [2021-05-06 08:08:46,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743306757] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:08:46,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:08:46,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 08:08:46,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740343718] [2021-05-06 08:08:46,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:08:46,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:46,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:08:46,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:08:46,914 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:08:47,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:47,012 INFO L93 Difference]: Finished difference Result 69 states and 102 transitions. [2021-05-06 08:08:47,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:08:47,012 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 08:08:47,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:47,015 INFO L225 Difference]: With dead ends: 69 [2021-05-06 08:08:47,015 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 08:08:47,016 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:08:47,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 08:08:47,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-06 08:08:47,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:08:47,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-05-06 08:08:47,025 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 28 [2021-05-06 08:08:47,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:47,026 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-05-06 08:08:47,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:08:47,026 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-05-06 08:08:47,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:08:47,027 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:47,027 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:47,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:47,249 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:47,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:47,250 INFO L82 PathProgramCache]: Analyzing trace with hash -864241798, now seen corresponding path program 1 times [2021-05-06 08:08:47,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:47,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817438073] [2021-05-06 08:08:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:47,282 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:47,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293485992] [2021-05-06 08:08:47,282 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 08:08:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:47,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:08:47,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:47,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-06 08:08:47,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:47,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817438073] [2021-05-06 08:08:47,595 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:47,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293485992] [2021-05-06 08:08:47,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293485992] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:08:47,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:08:47,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:08:47,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614937734] [2021-05-06 08:08:47,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:08:47,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:47,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:08:47,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:08:47,596 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:08:47,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:47,644 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2021-05-06 08:08:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:08:47,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:08:47,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:47,645 INFO L225 Difference]: With dead ends: 67 [2021-05-06 08:08:47,645 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 08:08:47,645 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:08:47,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 08:08:47,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 08:08:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 38 states have internal predecessors, (48), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 08:08:47,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-05-06 08:08:47,649 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 33 [2021-05-06 08:08:47,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:47,649 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-05-06 08:08:47,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:08:47,649 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-05-06 08:08:47,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:08:47,650 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:47,650 INFO L523 BasicCegarLoop]: trace histogram [4, 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 08:08:47,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:47,857 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:47,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:47,858 INFO L82 PathProgramCache]: Analyzing trace with hash -120478471, now seen corresponding path program 1 times [2021-05-06 08:08:47,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:47,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854305630] [2021-05-06 08:08:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:47,882 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:47,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48852508] [2021-05-06 08:08:47,883 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 08:08:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:47,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:08:48,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:48,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:08:48,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:48,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854305630] [2021-05-06 08:08:48,075 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:48,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48852508] [2021-05-06 08:08:48,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48852508] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:08:48,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:08:48,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:08:48,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941321511] [2021-05-06 08:08:48,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:08:48,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:48,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:08:48,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:08:48,076 INFO L87 Difference]: Start difference. First operand 65 states and 89 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 08:08:48,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:48,131 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2021-05-06 08:08:48,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:08:48,132 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2021-05-06 08:08:48,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:48,136 INFO L225 Difference]: With dead ends: 75 [2021-05-06 08:08:48,136 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 08:08:48,136 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:08:48,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 08:08:48,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-05-06 08:08:48,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 43 states have internal predecessors, (51), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:08:48,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-05-06 08:08:48,153 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 39 [2021-05-06 08:08:48,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:48,153 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-05-06 08:08:48,153 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 08:08:48,153 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2021-05-06 08:08:48,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:08:48,154 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:48,154 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1] [2021-05-06 08:08:48,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:48,373 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:48,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:48,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1628466672, now seen corresponding path program 1 times [2021-05-06 08:08:48,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:48,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822353862] [2021-05-06 08:08:48,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:48,390 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:48,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353857354] [2021-05-06 08:08:48,391 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 08:08:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:48,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:08:48,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:48,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:48,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:48,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:48,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:48,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:48,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:48,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:48,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:08:48,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:48,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822353862] [2021-05-06 08:08:48,571 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:48,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353857354] [2021-05-06 08:08:48,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353857354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:48,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:48,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:08:48,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739127618] [2021-05-06 08:08:48,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:08:48,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:48,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:08:48,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:08:48,572 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:08:48,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:48,674 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2021-05-06 08:08:48,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:08:48,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 08:08:48,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:48,675 INFO L225 Difference]: With dead ends: 99 [2021-05-06 08:08:48,675 INFO L226 Difference]: Without dead ends: 97 [2021-05-06 08:08:48,676 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:08:48,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-06 08:08:48,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-05-06 08:08:48,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 61 states have internal predecessors, (69), 26 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 08:08:48,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-05-06 08:08:48,712 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 42 [2021-05-06 08:08:48,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:48,713 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-05-06 08:08:48,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:08:48,713 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-05-06 08:08:48,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:08:48,715 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:48,715 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:48,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 08:08:48,934 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:48,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:48,935 INFO L82 PathProgramCache]: Analyzing trace with hash -739890515, now seen corresponding path program 1 times [2021-05-06 08:08:48,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:48,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579448191] [2021-05-06 08:08:48,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:48,941 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:48,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063407512] [2021-05-06 08:08:48,941 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 08:08:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:49,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:08:49,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:49,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:08:49,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:49,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579448191] [2021-05-06 08:08:49,191 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:49,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063407512] [2021-05-06 08:08:49,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063407512] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:08:49,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:08:49,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:08:49,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818867475] [2021-05-06 08:08:49,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:08:49,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:49,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:08:49,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:08:49,192 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:08:49,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:49,343 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2021-05-06 08:08:49,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:08:49,344 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2021-05-06 08:08:49,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:49,345 INFO L225 Difference]: With dead ends: 104 [2021-05-06 08:08:49,345 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 08:08:49,345 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:08:49,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 08:08:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-06 08:08:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 08:08:49,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-06 08:08:49,349 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2021-05-06 08:08:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:49,349 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-06 08:08:49,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:08:49,350 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-06 08:08:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 08:08:49,350 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:49,350 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1] [2021-05-06 08:08:49,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:49,569 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:49,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:49,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1527150038, now seen corresponding path program 1 times [2021-05-06 08:08:49,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:49,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710536294] [2021-05-06 08:08:49,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:49,586 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:49,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364064412] [2021-05-06 08:08:49,587 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 08:08:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:49,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:08:49,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:49,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:49,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:49,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:08:49,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:49,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710536294] [2021-05-06 08:08:49,901 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:49,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364064412] [2021-05-06 08:08:49,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364064412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:49,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:49,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:08:49,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251178714] [2021-05-06 08:08:49,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:08:49,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:49,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:08:49,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:08:49,902 INFO L87 Difference]: Start difference. First operand 103 states and 128 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:08:50,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:50,084 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2021-05-06 08:08:50,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:08:50,084 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 08:08:50,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:50,085 INFO L225 Difference]: With dead ends: 116 [2021-05-06 08:08:50,085 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 08:08:50,086 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:08:50,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 08:08:50,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-05-06 08:08:50,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 08:08:50,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-05-06 08:08:50,090 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2021-05-06 08:08:50,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:50,090 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-05-06 08:08:50,091 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:08:50,091 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-05-06 08:08:50,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:08:50,091 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:50,091 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:50,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:50,305 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:50,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:50,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1237367986, now seen corresponding path program 1 times [2021-05-06 08:08:50,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:50,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036500364] [2021-05-06 08:08:50,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:50,311 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:50,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525694223] [2021-05-06 08:08:50,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:08:50,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 08:08:50,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:50,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:50,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:50,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:50,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:50,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:50,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:50,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:50,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:50,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:50,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:50,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-06 08:08:50,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:50,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036500364] [2021-05-06 08:08:50,786 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:50,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525694223] [2021-05-06 08:08:50,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525694223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:50,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:50,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:08:50,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156658356] [2021-05-06 08:08:50,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:08:50,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:50,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:08:50,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:08:50,787 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:08:50,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:50,969 INFO L93 Difference]: Finished difference Result 129 states and 167 transitions. [2021-05-06 08:08:50,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:08:50,971 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2021-05-06 08:08:50,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:50,976 INFO L225 Difference]: With dead ends: 129 [2021-05-06 08:08:50,976 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 08:08:50,976 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:08:50,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 08:08:50,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-05-06 08:08:50,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 08:08:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2021-05-06 08:08:50,995 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2021-05-06 08:08:50,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:50,996 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2021-05-06 08:08:50,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:08:50,996 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2021-05-06 08:08:50,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 08:08:50,999 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:50,999 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:51,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 08:08:51,200 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:51,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:51,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1023588343, now seen corresponding path program 2 times [2021-05-06 08:08:51,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:51,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350358187] [2021-05-06 08:08:51,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:51,205 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:51,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845396878] [2021-05-06 08:08:51,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:51,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:08:51,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:08:51,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 08:08:51,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:08:51,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:08:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-06 08:08:51,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:08:51,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350358187] [2021-05-06 08:08:51,448 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:08:51,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845396878] [2021-05-06 08:08:51,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845396878] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:08:51,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:08:51,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:08:51,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254075770] [2021-05-06 08:08:51,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:08:51,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:08:51,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:08:51,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:08:51,450 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:08:51,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:08:51,572 INFO L93 Difference]: Finished difference Result 149 states and 201 transitions. [2021-05-06 08:08:51,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:08:51,572 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2021-05-06 08:08:51,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:08:51,573 INFO L225 Difference]: With dead ends: 149 [2021-05-06 08:08:51,574 INFO L226 Difference]: Without dead ends: 145 [2021-05-06 08:08:51,574 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:08:51,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-06 08:08:51,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-06 08:08:51,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 90 states have internal predecessors, (100), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 08:08:51,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-05-06 08:08:51,579 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 52 [2021-05-06 08:08:51,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:08:51,580 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-05-06 08:08:51,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:08:51,580 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-05-06 08:08:51,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:08:51,581 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:08:51,581 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:08:51,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:51,797 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:08:51,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:08:51,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1153573054, now seen corresponding path program 2 times [2021-05-06 08:08:51,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:08:51,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264259008] [2021-05-06 08:08:51,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:08:51,804 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:08:51,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866388114] [2021-05-06 08:08:51,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:51,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:08:51,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-06 08:08:51,916 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:08:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 08:08:51,939 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:08:52,019 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 08:08:52,019 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 08:08:52,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:08:52,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:08:52 BasicIcfg [2021-05-06 08:08:52,280 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:08:52,281 INFO L168 Benchmark]: Toolchain (without parser) took 8280.74 ms. Allocated memory was 182.5 MB in the beginning and 228.6 MB in the end (delta: 46.1 MB). Free memory was 147.0 MB in the beginning and 111.6 MB in the end (delta: 35.4 MB). Peak memory consumption was 82.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:08:52,281 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 182.5 MB. Free memory is still 163.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:08:52,300 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.01 ms. Allocated memory is still 182.5 MB. Free memory was 146.8 MB in the beginning and 163.9 MB in the end (delta: -17.1 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-05-06 08:08:52,301 INFO L168 Benchmark]: Boogie Preprocessor took 52.14 ms. Allocated memory is still 182.5 MB. Free memory was 163.9 MB in the beginning and 162.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:08:52,301 INFO L168 Benchmark]: RCFGBuilder took 421.47 ms. Allocated memory is still 182.5 MB. Free memory was 162.5 MB in the beginning and 146.4 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:08:52,301 INFO L168 Benchmark]: IcfgTransformer took 30.01 ms. Allocated memory is still 182.5 MB. Free memory was 146.4 MB in the beginning and 145.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:08:52,301 INFO L168 Benchmark]: TraceAbstraction took 7491.01 ms. Allocated memory was 182.5 MB in the beginning and 228.6 MB in the end (delta: 46.1 MB). Free memory was 144.7 MB in the beginning and 111.6 MB in the end (delta: 33.1 MB). Peak memory consumption was 79.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:08:52,301 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 182.5 MB. Free memory is still 163.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 272.01 ms. Allocated memory is still 182.5 MB. Free memory was 146.8 MB in the beginning and 163.9 MB in the end (delta: -17.1 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 52.14 ms. Allocated memory is still 182.5 MB. Free memory was 163.9 MB in the beginning and 162.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 421.47 ms. Allocated memory is still 182.5 MB. Free memory was 162.5 MB in the beginning and 146.4 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 30.01 ms. Allocated memory is still 182.5 MB. Free memory was 146.4 MB in the beginning and 145.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7491.01 ms. Allocated memory was 182.5 MB in the beginning and 228.6 MB in the end (delta: 46.1 MB). Free memory was 144.7 MB in the beginning and 111.6 MB in the end (delta: 33.1 MB). Peak memory consumption was 79.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=11, counter=0] [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=4, y=1] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=4, y=1] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=4, b=1, counter=0, p=1, q=0, r=0, s=1, x=4, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=4, b=1, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=4, y=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=3, b=1, counter=1, p=1, q=0, r=-1, s=1, x=4, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=1, counter=2, counter++=1, p=1, q=0, r=-1, s=1, x=4, y=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=2, b=1, counter=2, p=1, q=0, r=-2, s=1, x=4, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, counter=3, counter++=2, p=1, q=0, r=-2, s=1, x=4, y=1] [L34] COND FALSE !(counter++<2) [L53] CALL __VERIFIER_assert(a - b == 0) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7403.6ms, OverallIterations: 12, TraceHistogramMax: 7, EmptinessCheckTime: 29.8ms, AutomataDifference: 1424.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 430 SDtfs, 143 SDslu, 1228 SDs, 0 SdLazy, 768 SolverSat, 68 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 869.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 375 GetRequests, 314 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 634.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=145occurred in iteration=11, InterpolantAutomatonStates: 69, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 165.6ms AutomataMinimizationTime, 11 MinimizatonAttempts, 23 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 211.9ms SsaConstructionTime, 397.9ms SatisfiabilityAnalysisTime, 2144.5ms InterpolantComputationTime, 456 NumberOfCodeBlocks, 456 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 384 ConstructedInterpolants, 0 QuantifiedInterpolants, 1254 SizeOfPredicates, 21 NumberOfNonLiveVariables, 1478 ConjunctsInSsa, 121 ConjunctsInUnsatCore, 11 InterpolantComputations, 7 PerfectInterpolantSequences, 211/236 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...