/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/bresenham-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:09:50,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:09:50,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:09:50,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:09:50,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:09:50,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:09:50,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:09:50,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:09:50,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:09:50,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:09:50,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:09:50,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:09:50,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:09:50,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:09:50,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:09:50,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:09:50,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:09:50,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:09:50,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:09:50,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:09:50,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:09:50,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:09:50,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:09:50,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:09:50,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:09:50,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:09:50,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:09:50,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:09:50,919 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:09:50,928 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:09:50,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:09:50,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:09:50,929 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:09:50,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:09:50,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:09:50,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:09:50,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:09:50,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:09:50,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:09:50,930 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:09:50,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:09:50,930 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:09:50,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:09:50,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:09:50,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:09:50,931 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:09:50,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:09:50,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:09:50,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:09:50,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:09:50,932 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:09:50,932 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:09:51,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:09:51,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:09:51,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:09:51,175 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:09:51,175 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:09:51,176 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound100.c [2021-05-06 07:09:51,224 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/142258059/6883c73a97604e879cbf1e9708d4b0b0/FLAG4b70e55e1 [2021-05-06 07:09:51,567 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:09:51,568 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound100.c [2021-05-06 07:09:51,572 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/142258059/6883c73a97604e879cbf1e9708d4b0b0/FLAG4b70e55e1 [2021-05-06 07:09:51,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/142258059/6883c73a97604e879cbf1e9708d4b0b0 [2021-05-06 07:09:51,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:09:51,981 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:09:51,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:09:51,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:09:51,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:09:51,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:09:51" (1/1) ... [2021-05-06 07:09:51,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6607eb42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:51, skipping insertion in model container [2021-05-06 07:09:51,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:09:51" (1/1) ... [2021-05-06 07:09:52,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:09:52,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:09:52,110 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/bresenham-ll_valuebound100.c[597,610] [2021-05-06 07:09:52,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:09:52,147 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:09:52,156 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/bresenham-ll_valuebound100.c[597,610] [2021-05-06 07:09:52,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:09:52,220 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:09:52,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:52 WrapperNode [2021-05-06 07:09:52,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:09:52,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:09:52,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:09:52,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:09:52,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:52" (1/1) ... [2021-05-06 07:09:52,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:52" (1/1) ... [2021-05-06 07:09:52,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:52" (1/1) ... [2021-05-06 07:09:52,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:52" (1/1) ... [2021-05-06 07:09:52,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:52" (1/1) ... [2021-05-06 07:09:52,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:52" (1/1) ... [2021-05-06 07:09:52,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:52" (1/1) ... [2021-05-06 07:09:52,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:09:52,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:09:52,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:09:52,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:09:52,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:52" (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 07:09:52,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:09:52,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:09:52,320 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:09:52,320 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:09:52,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:09:52,320 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:09:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:09:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:09:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:09:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:09:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 07:09:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:09:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:09:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:09:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:09:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:09:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:09:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:09:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:09:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:09:52,525 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:09:52,525 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 07:09:52,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:09:52 BoogieIcfgContainer [2021-05-06 07:09:52,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:09:52,527 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:09:52,527 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:09:52,527 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:09:52,529 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:09:52" (1/1) ... [2021-05-06 07:09:52,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:09:52 BasicIcfg [2021-05-06 07:09:52,538 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:09:52,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:09:52,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:09:52,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:09:52,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:09:51" (1/4) ... [2021-05-06 07:09:52,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3a107f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:09:52, skipping insertion in model container [2021-05-06 07:09:52,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:09:52" (2/4) ... [2021-05-06 07:09:52,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3a107f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:09:52, skipping insertion in model container [2021-05-06 07:09:52,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:09:52" (3/4) ... [2021-05-06 07:09:52,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d3a107f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:09:52, skipping insertion in model container [2021-05-06 07:09:52,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:09:52" (4/4) ... [2021-05-06 07:09:52,543 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound100.cJordan [2021-05-06 07:09:52,546 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:09:52,548 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:09:52,558 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:09:52,569 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:09:52,569 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:09:52,569 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:09:52,569 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:09:52,569 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:09:52,569 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:09:52,570 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:09:52,570 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:09:52,581 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:09:52,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:09:52,587 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:52,587 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 07:09:52,587 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:52,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:52,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1563578423, now seen corresponding path program 1 times [2021-05-06 07:09:52,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:52,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318645146] [2021-05-06 07:09:52,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:52,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:09:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:52,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:09:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:52,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 07:09:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:52,802 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 07:09:52,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:09:52,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318645146] [2021-05-06 07:09:52,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318645146] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:09:52,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:09:52,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:09:52,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284036587] [2021-05-06 07:09:52,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:09:52,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:09:52,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:09:52,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:09:52,816 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:09:52,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:09:52,868 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-06 07:09:52,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:09:52,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 07:09:52,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:09:52,877 INFO L225 Difference]: With dead ends: 32 [2021-05-06 07:09:52,877 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 07:09:52,879 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:09:52,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 07:09:52,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 07:09:52,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:09:52,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-06 07:09:52,901 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2021-05-06 07:09:52,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:09:52,901 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-06 07:09:52,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:09:52,902 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-06 07:09:52,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:09:52,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:52,903 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 07:09:52,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:09:52,903 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:52,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:52,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1863481077, now seen corresponding path program 1 times [2021-05-06 07:09:52,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:52,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527696304] [2021-05-06 07:09:52,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:52,920 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:09:52,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349332642] [2021-05-06 07:09:52,920 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 07:09:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:53,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 07:09:53,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:09:53,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:53,142 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 07:09:53,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:09:53,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527696304] [2021-05-06 07:09:53,143 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:09:53,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349332642] [2021-05-06 07:09:53,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349332642] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:09:53,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:09:53,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 07:09:53,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684161361] [2021-05-06 07:09:53,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:09:53,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:09:53,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:09:53,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:09:53,145 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 07:09:53,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:09:53,205 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-05-06 07:09:53,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:09:53,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 07:09:53,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:09:53,214 INFO L225 Difference]: With dead ends: 37 [2021-05-06 07:09:53,214 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 07:09:53,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:09:53,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 07:09:53,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-06 07:09:53,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:09:53,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-06 07:09:53,219 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2021-05-06 07:09:53,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:09:53,220 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-06 07:09:53,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 07:09:53,220 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-06 07:09:53,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 07:09:53,221 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:53,221 INFO L523 BasicCegarLoop]: trace histogram [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 07:09:53,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:09:53,437 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:53,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:53,438 INFO L82 PathProgramCache]: Analyzing trace with hash -646008129, now seen corresponding path program 1 times [2021-05-06 07:09:53,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:53,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121100560] [2021-05-06 07:09:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:53,447 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:09:53,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101553740] [2021-05-06 07:09:53,448 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 07:09:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:53,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 07:09:53,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:09:53,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:53,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:53,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:53,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:53,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:53,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 07:09:53,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:09:53,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121100560] [2021-05-06 07:09:53,693 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:09:53,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101553740] [2021-05-06 07:09:53,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101553740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:09:53,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:09:53,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 07:09:53,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863313843] [2021-05-06 07:09:53,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 07:09:53,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:09:53,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 07:09:53,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:09:53,695 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 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 07:09:53,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:09:53,822 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-05-06 07:09:53,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 07:09:53,822 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 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 32 [2021-05-06 07:09:53,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:09:53,823 INFO L225 Difference]: With dead ends: 46 [2021-05-06 07:09:53,823 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 07:09:53,824 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-06 07:09:53,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 07:09:53,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-06 07:09:53,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:09:53,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-06 07:09:53,846 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 32 [2021-05-06 07:09:53,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:09:53,846 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-06 07:09:53,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 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 07:09:53,847 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-06 07:09:53,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 07:09:53,848 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:53,848 INFO L523 BasicCegarLoop]: trace histogram [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 07:09:54,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:54,069 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:54,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:54,069 INFO L82 PathProgramCache]: Analyzing trace with hash 241495552, now seen corresponding path program 1 times [2021-05-06 07:09:54,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:54,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554664047] [2021-05-06 07:09:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:54,094 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:09:54,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282236927] [2021-05-06 07:09:54,095 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 07:09:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:54,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 07:09:54,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:09:54,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:54,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:54,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:09:54,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:09:54,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554664047] [2021-05-06 07:09:54,335 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:09:54,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282236927] [2021-05-06 07:09:54,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282236927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:09:54,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:09:54,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 07:09:54,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580153287] [2021-05-06 07:09:54,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:09:54,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:09:54,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:09:54,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:09:54,336 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:09:54,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:09:54,451 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-05-06 07:09:54,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:09:54,451 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-05-06 07:09:54,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:09:54,452 INFO L225 Difference]: With dead ends: 54 [2021-05-06 07:09:54,452 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 07:09:54,452 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:09:54,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 07:09:54,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-05-06 07:09:54,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 07:09:54,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-05-06 07:09:54,465 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 32 [2021-05-06 07:09:54,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:09:54,466 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-05-06 07:09:54,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:09:54,466 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-05-06 07:09:54,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 07:09:54,467 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:54,467 INFO L523 BasicCegarLoop]: trace histogram [3, 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, 1, 1] [2021-05-06 07:09:54,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:54,684 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:54,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:54,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1661983408, now seen corresponding path program 1 times [2021-05-06 07:09:54,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:54,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461627758] [2021-05-06 07:09:54,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:54,700 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:09:54,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822607517] [2021-05-06 07:09:54,701 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 07:09:54,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:09:54,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 07:09:54,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:09:54,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:54,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:54,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:54,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:54,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:54,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:54,942 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 07:09:54,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:09:54,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461627758] [2021-05-06 07:09:54,942 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:09:54,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822607517] [2021-05-06 07:09:54,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822607517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:09:54,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:09:54,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 07:09:54,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008374689] [2021-05-06 07:09:54,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 07:09:54,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:09:54,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 07:09:54,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-06 07:09:54,944 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 07:09:55,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:09:55,158 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-05-06 07:09:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 07:09:55,158 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2021-05-06 07:09:55,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:09:55,159 INFO L225 Difference]: With dead ends: 59 [2021-05-06 07:09:55,159 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 07:09:55,159 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-06 07:09:55,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 07:09:55,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2021-05-06 07:09:55,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:09:55,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-06 07:09:55,162 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 39 [2021-05-06 07:09:55,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:09:55,162 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-06 07:09:55,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 07:09:55,163 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-06 07:09:55,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 07:09:55,163 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:09:55,163 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:09:55,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:55,369 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:09:55,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:09:55,369 INFO L82 PathProgramCache]: Analyzing trace with hash 718222219, now seen corresponding path program 2 times [2021-05-06 07:09:55,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:09:55,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395107189] [2021-05-06 07:09:55,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:09:55,377 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:09:55,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339419627] [2021-05-06 07:09:55,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:09:55,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:09:55,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:09:55,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 07:09:55,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:09:55,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:55,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:55,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:55,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:55,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:55,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:55,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:55,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:55,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:55,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:55,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:09:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 07:09:55,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:09:55,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395107189] [2021-05-06 07:09:55,760 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:09:55,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339419627] [2021-05-06 07:09:55,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339419627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:09:55,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:09:55,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 07:09:55,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220301504] [2021-05-06 07:09:55,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 07:09:55,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:09:55,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 07:09:55,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:09:55,762 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 13 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 07:10:36,141 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-05-06 07:10:48,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:10:48,093 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-05-06 07:10:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 07:10:48,093 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2021-05-06 07:10:48,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:10:48,093 INFO L225 Difference]: With dead ends: 54 [2021-05-06 07:10:48,094 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 07:10:48,094 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 648.8ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-06 07:10:48,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 07:10:48,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 07:10:48,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 07:10:48,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 07:10:48,094 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-05-06 07:10:48,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:10:48,094 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 07:10:48,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 07:10:48,095 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 07:10:48,095 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 07:10:48,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 07:10:48,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:10:48 BasicIcfg [2021-05-06 07:10:48,304 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 07:10:48,304 INFO L168 Benchmark]: Toolchain (without parser) took 56323.48 ms. Allocated memory was 198.2 MB in the beginning and 238.0 MB in the end (delta: 39.8 MB). Free memory was 163.6 MB in the beginning and 90.2 MB in the end (delta: 73.4 MB). Peak memory consumption was 113.5 MB. Max. memory is 8.0 GB. [2021-05-06 07:10:48,305 INFO L168 Benchmark]: CDTParser took 0.08 ms. Allocated memory is still 198.2 MB. Free memory is still 180.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:10:48,305 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.15 ms. Allocated memory is still 198.2 MB. Free memory was 163.4 MB in the beginning and 181.6 MB in the end (delta: -18.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. [2021-05-06 07:10:48,305 INFO L168 Benchmark]: Boogie Preprocessor took 42.74 ms. Allocated memory is still 198.2 MB. Free memory was 181.6 MB in the beginning and 179.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 07:10:48,305 INFO L168 Benchmark]: RCFGBuilder took 261.30 ms. Allocated memory is still 198.2 MB. Free memory was 179.7 MB in the beginning and 164.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 07:10:48,305 INFO L168 Benchmark]: IcfgTransformer took 11.61 ms. Allocated memory is still 198.2 MB. Free memory was 164.5 MB in the beginning and 163.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:10:48,305 INFO L168 Benchmark]: TraceAbstraction took 55764.87 ms. Allocated memory was 198.2 MB in the beginning and 238.0 MB in the end (delta: 39.8 MB). Free memory was 163.0 MB in the beginning and 90.2 MB in the end (delta: 72.7 MB). Peak memory consumption was 112.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:10:48,306 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08 ms. Allocated memory is still 198.2 MB. Free memory is still 180.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 232.15 ms. Allocated memory is still 198.2 MB. Free memory was 163.4 MB in the beginning and 181.6 MB in the end (delta: -18.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.74 ms. Allocated memory is still 198.2 MB. Free memory was 181.6 MB in the beginning and 179.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 261.30 ms. Allocated memory is still 198.2 MB. Free memory was 179.7 MB in the beginning and 164.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 11.61 ms. Allocated memory is still 198.2 MB. Free memory was 164.5 MB in the beginning and 163.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 55764.87 ms. Allocated memory was 198.2 MB in the beginning and 238.0 MB in the end (delta: 39.8 MB). Free memory was 163.0 MB in the beginning and 90.2 MB in the end (delta: 72.7 MB). Peak memory consumption was 112.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 55733.6ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 16.0ms, AutomataDifference: 52935.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 145 SDtfs, 100 SDslu, 727 SDs, 0 SdLazy, 833 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 52072.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 188 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1131.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=4, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 55.3ms AutomataMinimizationTime, 6 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 54.2ms SsaConstructionTime, 163.8ms SatisfiabilityAnalysisTime, 1140.3ms InterpolantComputationTime, 190 NumberOfCodeBlocks, 190 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 936 SizeOfPredicates, 23 NumberOfNonLiveVariables, 703 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 42/60 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...