/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/mannadiv_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:52:50,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:52:50,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:52:50,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 09:52:50,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 09:52:50,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 09:52:50,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 09:52:50,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 09:52:50,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 09:52:50,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 09:52:50,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 09:52:50,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 09:52:50,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:52:50,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:52:50,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:52:50,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:52:50,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:52:50,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:52:50,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:52:50,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:52:50,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:52:50,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:52:50,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:52:50,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:52:50,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:52:50,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:52:50,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:52:50,890 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:52:50,890 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:52:50,897 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:52:50,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:52:50,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:52:50,899 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:52:50,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:52:50,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:52:50,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:52:50,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:52:50,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:52:50,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:52:50,900 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:52:50,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:52:50,900 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:52:50,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:52:50,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:52:50,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:52:50,901 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:52:50,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:52:50,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:52:50,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:52:50,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:52:50,902 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:52:50,902 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:52:51,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:52:51,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:52:51,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:52:51,100 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:52:51,101 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:52:51,101 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound5.c [2021-05-06 09:52:51,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203e0f821/b6237b5015fb4402836fb443b8a6b9a0/FLAGda21dfd62 [2021-05-06 09:52:51,492 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:52:51,493 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound5.c [2021-05-06 09:52:51,497 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203e0f821/b6237b5015fb4402836fb443b8a6b9a0/FLAGda21dfd62 [2021-05-06 09:52:51,510 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/203e0f821/b6237b5015fb4402836fb443b8a6b9a0 [2021-05-06 09:52:51,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:52:51,513 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:52:51,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:52:51,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:52:51,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:52:51,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:52:51" (1/1) ... [2021-05-06 09:52:51,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ba77c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:51, skipping insertion in model container [2021-05-06 09:52:51,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:52:51" (1/1) ... [2021-05-06 09:52:51,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:52:51,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:52:51,635 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/mannadiv_unwindbound5.c[573,586] [2021-05-06 09:52:51,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:52:51,653 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:52:51,662 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/mannadiv_unwindbound5.c[573,586] [2021-05-06 09:52:51,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:52:51,687 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:52:51,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:51 WrapperNode [2021-05-06 09:52:51,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:52:51,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:52:51,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:52:51,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:52:51,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:51" (1/1) ... [2021-05-06 09:52:51,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:51" (1/1) ... [2021-05-06 09:52:51,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:51" (1/1) ... [2021-05-06 09:52:51,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:51" (1/1) ... [2021-05-06 09:52:51,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:51" (1/1) ... [2021-05-06 09:52:51,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:51" (1/1) ... [2021-05-06 09:52:51,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:51" (1/1) ... [2021-05-06 09:52:51,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:52:51,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:52:51,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:52:51,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:52:51,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:52:51,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:52:51,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:52:51,818 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:52:51,818 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:52:51,819 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:52:51,819 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:52:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:52:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:52:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:52:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:52:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 09:52:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:52:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:52:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:52:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:52:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:52:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:52:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:52:51,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:52:51,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:52:51,990 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:52:51,991 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 09:52:51,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:52:51 BoogieIcfgContainer [2021-05-06 09:52:51,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:52:51,992 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:52:51,992 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:52:51,993 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:52:51,994 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:52:51" (1/1) ... [2021-05-06 09:52:52,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:52:52 BasicIcfg [2021-05-06 09:52:52,003 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:52:52,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:52:52,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:52:52,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:52:52,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:52:51" (1/4) ... [2021-05-06 09:52:52,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71748219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:52:52, skipping insertion in model container [2021-05-06 09:52:52,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:52:51" (2/4) ... [2021-05-06 09:52:52,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71748219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:52:52, skipping insertion in model container [2021-05-06 09:52:52,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:52:51" (3/4) ... [2021-05-06 09:52:52,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71748219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:52:52, skipping insertion in model container [2021-05-06 09:52:52,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:52:52" (4/4) ... [2021-05-06 09:52:52,007 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound5.cJordan [2021-05-06 09:52:52,011 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:52:52,013 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:52:52,023 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:52:52,034 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:52:52,034 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:52:52,034 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:52:52,034 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:52:52,034 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:52:52,034 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:52:52,034 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:52:52,034 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:52:52,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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 09:52:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 09:52:52,046 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:52,047 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 09:52:52,047 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:52,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:52,068 INFO L82 PathProgramCache]: Analyzing trace with hash 734203501, now seen corresponding path program 1 times [2021-05-06 09:52:52,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:52,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960491851] [2021-05-06 09:52:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:52:52,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:52:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:52:52,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:52:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:52:52,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 09:52:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:52:52,219 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 09:52:52,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:52,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960491851] [2021-05-06 09:52:52,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960491851] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:52:52,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:52:52,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:52:52,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360812351] [2021-05-06 09:52:52,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:52:52,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:52,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:52:52,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:52:52,233 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 09:52:52,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:52,283 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-05-06 09:52:52,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:52:52,284 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), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 09:52:52,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:52,289 INFO L225 Difference]: With dead ends: 31 [2021-05-06 09:52:52,289 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 09:52:52,290 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:52:52,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 09:52:52,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 09:52:52,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 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 09:52:52,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-06 09:52:52,310 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-06 09:52:52,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:52,310 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-06 09:52:52,310 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), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:52:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-06 09:52:52,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 09:52:52,327 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:52,327 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 09:52:52,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:52:52,328 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:52,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:52,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1669026344, now seen corresponding path program 1 times [2021-05-06 09:52:52,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:52,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469250011] [2021-05-06 09:52:52,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:52,346 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:52,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230840949] [2021-05-06 09:52:52,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:52:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:52:52,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 09:52:52,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:52,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,489 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 09:52:52,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:52,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469250011] [2021-05-06 09:52:52,489 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:52,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230840949] [2021-05-06 09:52:52,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230840949] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:52:52,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:52:52,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 09:52:52,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527598843] [2021-05-06 09:52:52,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 09:52:52,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:52,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 09:52:52,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:52:52,491 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:52:52,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:52,499 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-05-06 09:52:52,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 09:52:52,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 09:52:52,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:52,500 INFO L225 Difference]: With dead ends: 27 [2021-05-06 09:52:52,500 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 09:52:52,501 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:52:52,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 09:52:52,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 09:52:52,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 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 09:52:52,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-06 09:52:52,504 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-06 09:52:52,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:52,504 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-06 09:52:52,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:52:52,504 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-06 09:52:52,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 09:52:52,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:52,505 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 09:52:52,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 09:52:52,722 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:52,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:52,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1667953868, now seen corresponding path program 1 times [2021-05-06 09:52:52,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:52,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427785062] [2021-05-06 09:52:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:52,733 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:52,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978364366] [2021-05-06 09:52:52,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:52:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:52:52,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 09:52:52,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:52,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 09:52:52,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:52,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427785062] [2021-05-06 09:52:52,914 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:52,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978364366] [2021-05-06 09:52:52,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978364366] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:52:52,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:52:52,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 09:52:52,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184107017] [2021-05-06 09:52:52,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:52:52,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:52,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:52:52,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:52:52,917 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 09:52:52,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:52,984 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-05-06 09:52:52,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:52:52,985 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 09:52:52,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:52,986 INFO L225 Difference]: With dead ends: 35 [2021-05-06 09:52:52,986 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 09:52:52,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:52:52,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 09:52:52,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-06 09:52:52,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 09:52:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-06 09:52:52,990 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-06 09:52:52,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:52,990 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-06 09:52:52,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 09:52:52,990 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-06 09:52:52,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 09:52:52,991 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:52,991 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, 1] [2021-05-06 09:52:53,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:52:53,211 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:53,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:53,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1179905874, now seen corresponding path program 1 times [2021-05-06 09:52:53,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:53,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920973261] [2021-05-06 09:52:53,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:53,221 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:53,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698710940] [2021-05-06 09:52:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:52:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:52:53,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 09:52:53,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:53,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:53,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:53,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920973261] [2021-05-06 09:52:53,379 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:53,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698710940] [2021-05-06 09:52:53,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698710940] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:53,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:53,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:52:53,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578480486] [2021-05-06 09:52:53,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:52:53,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:53,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:52:53,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:52:53,381 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 09:52:53,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:53,464 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-05-06 09:52:53,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:52:53,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-05-06 09:52:53,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:53,466 INFO L225 Difference]: With dead ends: 37 [2021-05-06 09:52:53,466 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 09:52:53,466 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:52:53,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 09:52:53,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2021-05-06 09:52:53,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 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 09:52:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-06 09:52:53,469 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2021-05-06 09:52:53,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:53,469 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-06 09:52:53,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 09:52:53,470 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-06 09:52:53,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 09:52:53,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:53,470 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-05-06 09:52:53,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:52:53,687 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:53,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:53,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1668946595, now seen corresponding path program 1 times [2021-05-06 09:52:53,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:53,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587444841] [2021-05-06 09:52:53,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:53,696 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:53,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699185431] [2021-05-06 09:52:53,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:52:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:52:53,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 09:52:53,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:53,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:53,822 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 09:52:53,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:53,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587444841] [2021-05-06 09:52:53,823 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:53,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699185431] [2021-05-06 09:52:53,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699185431] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:53,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:53,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 09:52:53,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832382994] [2021-05-06 09:52:53,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:52:53,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:53,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:52:53,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:52:53,825 INFO L87 Difference]: Start difference. First operand 29 states and 31 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 09:52:53,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:53,851 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-05-06 09:52:53,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:52:53,851 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-06 09:52:53,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:53,852 INFO L225 Difference]: With dead ends: 38 [2021-05-06 09:52:53,852 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 09:52:53,852 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:52:53,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 09:52:53,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 09:52:53,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 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 09:52:53,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-06 09:52:53,855 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2021-05-06 09:52:53,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:53,856 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-06 09:52:53,856 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 09:52:53,856 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-06 09:52:53,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 09:52:53,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:53,857 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 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 09:52:54,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:52:54,076 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:54,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:54,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1377493560, now seen corresponding path program 2 times [2021-05-06 09:52:54,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:54,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117700202] [2021-05-06 09:52:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:54,085 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:54,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110579901] [2021-05-06 09:52:54,086 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 09:52:54,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:52:54,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:52:54,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:52:54,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:54,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,268 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:54,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:54,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117700202] [2021-05-06 09:52:54,268 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:54,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110579901] [2021-05-06 09:52:54,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110579901] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:54,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:54,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 09:52:54,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530588104] [2021-05-06 09:52:54,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:52:54,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:54,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:52:54,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:52:54,270 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 09:52:54,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:54,304 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-06 09:52:54,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:52:54,305 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-06 09:52:54,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:54,305 INFO L225 Difference]: With dead ends: 47 [2021-05-06 09:52:54,306 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 09:52:54,306 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:52:54,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 09:52:54,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 09:52:54,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 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 09:52:54,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-06 09:52:54,309 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2021-05-06 09:52:54,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:54,309 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-06 09:52:54,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 09:52:54,309 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-06 09:52:54,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 09:52:54,310 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:54,310 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:54,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 09:52:54,519 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:54,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:54,519 INFO L82 PathProgramCache]: Analyzing trace with hash 489214531, now seen corresponding path program 3 times [2021-05-06 09:52:54,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:54,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92713567] [2021-05-06 09:52:54,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:54,555 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:54,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008419892] [2021-05-06 09:52:54,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:52:54,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 09:52:54,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:52:54,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 09:52:54,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:54,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:54,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:54,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92713567] [2021-05-06 09:52:54,830 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:54,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008419892] [2021-05-06 09:52:54,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008419892] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:54,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:54,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:52:54,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117247341] [2021-05-06 09:52:54,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:52:54,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:54,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:52:54,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:52:54,831 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 09:52:54,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:54,874 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-05-06 09:52:54,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:52:54,874 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2021-05-06 09:52:54,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:54,875 INFO L225 Difference]: With dead ends: 56 [2021-05-06 09:52:54,875 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 09:52:54,875 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:52:54,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 09:52:54,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 09:52:54,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 09:52:54,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-05-06 09:52:54,879 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2021-05-06 09:52:54,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:54,879 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-05-06 09:52:54,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 09:52:54,879 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-05-06 09:52:54,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 09:52:54,880 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:54,880 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:55,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:52:55,093 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:55,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:55,094 INFO L82 PathProgramCache]: Analyzing trace with hash -906969448, now seen corresponding path program 4 times [2021-05-06 09:52:55,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:55,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459948614] [2021-05-06 09:52:55,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:55,101 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:55,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652186929] [2021-05-06 09:52:55,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 09:52:55,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 09:52:55,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:52:55,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 09:52:55,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:52:55,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:52:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:52:55,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:52:55,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459948614] [2021-05-06 09:52:55,316 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:52:55,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652186929] [2021-05-06 09:52:55,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652186929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:52:55,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:52:55,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:52:55,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081974013] [2021-05-06 09:52:55,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:52:55,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:52:55,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:52:55,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:52:55,317 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 09:52:55,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:52:55,372 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-05-06 09:52:55,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 09:52:55,373 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2021-05-06 09:52:55,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:52:55,374 INFO L225 Difference]: With dead ends: 65 [2021-05-06 09:52:55,374 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 09:52:55,374 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:52:55,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 09:52:55,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 09:52:55,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:52:55,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-05-06 09:52:55,378 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2021-05-06 09:52:55,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:52:55,378 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-05-06 09:52:55,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 09:52:55,378 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-05-06 09:52:55,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 09:52:55,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:52:55,379 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:52:55,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:52:55,600 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:52:55,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:52:55,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1572135395, now seen corresponding path program 5 times [2021-05-06 09:52:55,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:52:55,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984416179] [2021-05-06 09:52:55,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:52:55,607 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:52:55,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915557102] [2021-05-06 09:52:55,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 09:52:55,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 09:52:55,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-06 09:52:55,690 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 09:52:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 09:52:55,711 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 09:52:55,763 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 09:52:55,763 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 09:52:55,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 09:52:56,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:52:56 BasicIcfg [2021-05-06 09:52:56,012 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 09:52:56,012 INFO L168 Benchmark]: Toolchain (without parser) took 4499.14 ms. Allocated memory was 179.3 MB in the beginning and 237.0 MB in the end (delta: 57.7 MB). Free memory was 145.2 MB in the beginning and 139.1 MB in the end (delta: 6.2 MB). Peak memory consumption was 64.0 MB. Max. memory is 8.0 GB. [2021-05-06 09:52:56,013 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 179.3 MB. Free memory is still 161.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 09:52:56,013 INFO L168 Benchmark]: CACSL2BoogieTranslator took 170.71 ms. Allocated memory is still 179.3 MB. Free memory was 144.9 MB in the beginning and 135.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 09:52:56,013 INFO L168 Benchmark]: Boogie Preprocessor took 57.20 ms. Allocated memory is still 179.3 MB. Free memory was 135.0 MB in the beginning and 162.0 MB in the end (delta: -27.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-05-06 09:52:56,013 INFO L168 Benchmark]: RCFGBuilder took 244.75 ms. Allocated memory is still 179.3 MB. Free memory was 162.0 MB in the beginning and 147.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 09:52:56,013 INFO L168 Benchmark]: IcfgTransformer took 11.17 ms. Allocated memory is still 179.3 MB. Free memory was 147.4 MB in the beginning and 146.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 09:52:56,013 INFO L168 Benchmark]: TraceAbstraction took 4007.93 ms. Allocated memory was 179.3 MB in the beginning and 237.0 MB in the end (delta: 57.7 MB). Free memory was 145.8 MB in the beginning and 139.1 MB in the end (delta: 6.7 MB). Peak memory consumption was 64.9 MB. Max. memory is 8.0 GB. [2021-05-06 09:52:56,014 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 179.3 MB. Free memory is still 161.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 170.71 ms. Allocated memory is still 179.3 MB. Free memory was 144.9 MB in the beginning and 135.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 57.20 ms. Allocated memory is still 179.3 MB. Free memory was 135.0 MB in the beginning and 162.0 MB in the end (delta: -27.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 244.75 ms. Allocated memory is still 179.3 MB. Free memory was 162.0 MB in the beginning and 147.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 11.17 ms. Allocated memory is still 179.3 MB. Free memory was 147.4 MB in the beginning and 146.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4007.93 ms. Allocated memory was 179.3 MB in the beginning and 237.0 MB in the end (delta: 57.7 MB). Free memory was 145.8 MB in the beginning and 139.1 MB in the end (delta: 6.7 MB). Peak memory consumption was 64.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=13, counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L29] RET assume_abort_if_not(x1 >= 0) VAL [\old(counter)=0, counter=0, x1=6, x2=1] [L30] CALL assume_abort_if_not(x2 != 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L30] RET assume_abort_if_not(x2 != 0) VAL [\old(counter)=0, counter=0, x1=6, x2=1] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [\old(counter)=0, counter=0, x1=6, x2=1, y1=0, y2=0, y3=6] [L36] EXPR counter++ VAL [\old(counter)=0, counter=1, counter++=0, x1=6, x2=1, y1=0, y2=0, y3=6] [L36] COND TRUE counter++<5 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=1, x1=6, x2=1, y1=0, y2=0, y3=6] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=1, x1=6, x2=1, y1=0, y2=0, y3=6] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=1, x1=6, x2=1, y1=1, y2=0, y3=5] [L36] EXPR counter++ VAL [\old(counter)=0, counter=2, counter++=1, x1=6, x2=1, y1=1, y2=0, y3=5] [L36] COND TRUE counter++<5 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=2, x1=6, x2=1, y1=1, y2=0, y3=5] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=2, x1=6, x2=1, y1=1, y2=0, y3=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=2, x1=6, x2=1, y1=2, y2=0, y3=4] [L36] EXPR counter++ VAL [\old(counter)=0, counter=3, counter++=2, x1=6, x2=1, y1=2, y2=0, y3=4] [L36] COND TRUE counter++<5 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=3, x1=6, x2=1, y1=2, y2=0, y3=4] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=3, x1=6, x2=1, y1=2, y2=0, y3=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=3, x1=6, x2=1, y1=3, y2=0, y3=3] [L36] EXPR counter++ VAL [\old(counter)=0, counter=4, counter++=3, x1=6, x2=1, y1=3, y2=0, y3=3] [L36] COND TRUE counter++<5 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=4, x1=6, x2=1, y1=3, y2=0, y3=3] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=4, x1=6, x2=1, y1=3, y2=0, y3=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=4, x1=6, x2=1, y1=4, y2=0, y3=2] [L36] EXPR counter++ VAL [\old(counter)=0, counter=5, counter++=4, x1=6, x2=1, y1=4, y2=0, y3=2] [L36] COND TRUE counter++<5 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=5, x1=6, x2=1, y1=4, y2=0, y3=2] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=5, x1=6, x2=1, y1=4, y2=0, y3=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=5, x1=6, x2=1, y1=5, y2=0, y3=1] [L36] EXPR counter++ VAL [\old(counter)=0, counter=6, counter++=5, x1=6, x2=1, y1=5, y2=0, y3=1] [L36] COND FALSE !(counter++<5) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L16] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L18] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3931.4ms, OverallIterations: 9, TraceHistogramMax: 6, EmptinessCheckTime: 26.5ms, AutomataDifference: 398.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 212 SDtfs, 85 SDslu, 505 SDs, 0 SdLazy, 219 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 193.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 275 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 250.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=8, InterpolantAutomatonStates: 59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 35.0ms AutomataMinimizationTime, 8 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 89.4ms SsaConstructionTime, 241.7ms SatisfiabilityAnalysisTime, 820.3ms InterpolantComputationTime, 347 NumberOfCodeBlocks, 347 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 271 ConstructedInterpolants, 0 QuantifiedInterpolants, 733 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1130 ConjunctsInSsa, 69 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 53/164 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...