/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/egcd3-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:33:42,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:33:42,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:33:42,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 20:33:42,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:33:42,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:33:42,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:33:42,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:33:42,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:33:42,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:33:42,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:33:42,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:33:42,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:33:42,947 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:33:42,948 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:33:42,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:33:42,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:33:42,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:33:42,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:33:42,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:33:42,970 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:33:42,988 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:33:42,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:33:42,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:33:42,992 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:33:42,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:33:42,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:33:42,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:33:42,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:33:42,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:33:42,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:33:42,994 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:33:42,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:33:42,994 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:33:42,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:33:42,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:33:42,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:33:42,995 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:33:42,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:33:42,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:33:42,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:33:42,996 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:33:42,997 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:33:42,997 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:33:43,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:33:43,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:33:43,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:33:43,331 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:33:43,333 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:33:43,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c [2021-05-02 20:33:43,391 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a394412c5/8657e002a5b34900ba0304d5cffb1dcb/FLAGd941091c0 [2021-05-02 20:33:43,870 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:33:43,871 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c [2021-05-02 20:33:43,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a394412c5/8657e002a5b34900ba0304d5cffb1dcb/FLAGd941091c0 [2021-05-02 20:33:43,902 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a394412c5/8657e002a5b34900ba0304d5cffb1dcb [2021-05-02 20:33:43,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:33:43,912 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:33:43,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:33:43,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:33:43,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:33:43,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:33:43" (1/1) ... [2021-05-02 20:33:43,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3690446c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:43, skipping insertion in model container [2021-05-02 20:33:43,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:33:43" (1/1) ... [2021-05-02 20:33:43,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:33:43,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:33:44,087 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/egcd3-ll_valuebound100.c[490,503] [2021-05-02 20:33:44,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:33:44,177 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:33:44,197 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/egcd3-ll_valuebound100.c[490,503] [2021-05-02 20:33:44,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:33:44,228 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:33:44,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:44 WrapperNode [2021-05-02 20:33:44,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:33:44,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:33:44,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:33:44,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:33:44,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:44" (1/1) ... [2021-05-02 20:33:44,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:44" (1/1) ... [2021-05-02 20:33:44,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:44" (1/1) ... [2021-05-02 20:33:44,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:44" (1/1) ... [2021-05-02 20:33:44,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:44" (1/1) ... [2021-05-02 20:33:44,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:44" (1/1) ... [2021-05-02 20:33:44,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:44" (1/1) ... [2021-05-02 20:33:44,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:33:44,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:33:44,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:33:44,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:33:44,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:33:44,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:33:44,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:33:44,360 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:33:44,360 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:33:44,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:33:44,360 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:33:44,360 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:33:44,360 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:33:44,361 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:33:44,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:33:44,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:33:44,361 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:33:44,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:33:44,362 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:33:44,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:33:44,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:33:44,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:33:44,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:33:44,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:33:44,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:33:44,661 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:33:44,662 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 20:33:44,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:44 BoogieIcfgContainer [2021-05-02 20:33:44,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:33:44,664 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:33:44,664 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:33:44,681 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:33:44,683 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:44" (1/1) ... [2021-05-02 20:33:44,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:33:44 BasicIcfg [2021-05-02 20:33:44,698 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:33:44,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:33:44,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:33:44,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:33:44,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:33:43" (1/4) ... [2021-05-02 20:33:44,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd19e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:33:44, skipping insertion in model container [2021-05-02 20:33:44,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:33:44" (2/4) ... [2021-05-02 20:33:44,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd19e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:33:44, skipping insertion in model container [2021-05-02 20:33:44,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:33:44" (3/4) ... [2021-05-02 20:33:44,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd19e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:33:44, skipping insertion in model container [2021-05-02 20:33:44,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:33:44" (4/4) ... [2021-05-02 20:33:44,704 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.cJordan [2021-05-02 20:33:44,709 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:33:44,719 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:33:44,734 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:33:44,759 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:33:44,759 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:33:44,759 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:33:44,759 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:33:44,760 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:33:44,760 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:33:44,760 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:33:44,760 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:33:44,776 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:33:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:33:44,788 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:44,789 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:44,789 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:44,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:44,795 INFO L82 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2021-05-02 20:33:44,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:44,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23001649] [2021-05-02 20:33:44,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:45,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:33:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:45,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:33:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:45,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:33:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:45,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:33:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:45,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:33:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:33:45,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:45,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23001649] [2021-05-02 20:33:45,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23001649] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:45,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:45,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:33:45,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250657233] [2021-05-02 20:33:45,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:33:45,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:45,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:33:45,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:33:45,086 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:33:45,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:45,208 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-05-02 20:33:45,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:33:45,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:33:45,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:45,215 INFO L225 Difference]: With dead ends: 40 [2021-05-02 20:33:45,215 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:33:45,216 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:33:45,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:33:45,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:33:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:33:45,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 20:33:45,249 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-02 20:33:45,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:45,249 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 20:33:45,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:33:45,250 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 20:33:45,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 20:33:45,252 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:45,252 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:45,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:33:45,253 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:45,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:45,254 INFO L82 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2021-05-02 20:33:45,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:45,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557732009] [2021-05-02 20:33:45,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:45,289 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:45,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [319938722] [2021-05-02 20:33:45,290 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 [2021-05-02 20:33:45,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:45,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:33:45,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:45,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:33:45,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:45,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557732009] [2021-05-02 20:33:45,466 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:45,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319938722] [2021-05-02 20:33:45,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319938722] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:45,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:45,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:33:45,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597487018] [2021-05-02 20:33:45,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:33:45,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:45,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:33:45,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:33:45,469 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:33:45,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:45,566 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-02 20:33:45,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:33:45,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-02 20:33:45,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:45,567 INFO L225 Difference]: With dead ends: 47 [2021-05-02 20:33:45,568 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 20:33:45,568 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:45,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 20:33:45,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-02 20:33:45,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:33:45,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 20:33:45,576 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-02 20:33:45,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:45,576 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 20:33:45,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:33:45,577 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 20:33:45,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 20:33:45,578 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:45,578 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:45,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:33:45,793 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:45,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:45,794 INFO L82 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2021-05-02 20:33:45,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:45,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19856303] [2021-05-02 20:33:45,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:45,806 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:45,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754200664] [2021-05-02 20:33:45,806 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 [2021-05-02 20:33:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:45,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:33:45,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:45,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:45,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:33:46,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:46,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19856303] [2021-05-02 20:33:46,184 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:46,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754200664] [2021-05-02 20:33:46,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754200664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:46,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:46,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:33:46,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275839542] [2021-05-02 20:33:46,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:33:46,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:46,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:33:46,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:46,186 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:33:46,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:46,302 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-05-02 20:33:46,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:33:46,303 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-02 20:33:46,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:46,308 INFO L225 Difference]: With dead ends: 51 [2021-05-02 20:33:46,308 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 20:33:46,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:46,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 20:33:46,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 20:33:46,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:33:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-02 20:33:46,327 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-02 20:33:46,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:46,327 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-02 20:33:46,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:33:46,327 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-02 20:33:46,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:33:46,328 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:46,328 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:46,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:46,529 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:46,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:46,529 INFO L82 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2021-05-02 20:33:46,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:46,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157257494] [2021-05-02 20:33:46,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:46,543 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:46,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477844639] [2021-05-02 20:33:46,543 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 [2021-05-02 20:33:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:46,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:33:46,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:46,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:33:46,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:46,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157257494] [2021-05-02 20:33:46,719 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:46,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477844639] [2021-05-02 20:33:46,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477844639] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:46,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:46,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:33:46,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456056465] [2021-05-02 20:33:46,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:33:46,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:46,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:33:46,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:46,721 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:33:46,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:46,916 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2021-05-02 20:33:46,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:33:46,917 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 20:33:46,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:46,921 INFO L225 Difference]: With dead ends: 96 [2021-05-02 20:33:46,921 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 20:33:46,924 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:46,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 20:33:46,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-02 20:33:46,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:33:46,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-02 20:33:46,942 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-02 20:33:46,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:46,943 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-02 20:33:46,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:33:46,943 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-02 20:33:46,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:33:46,945 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:46,945 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:47,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:47,149 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:47,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:47,150 INFO L82 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2021-05-02 20:33:47,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:47,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831793727] [2021-05-02 20:33:47,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:47,160 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:47,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403958771] [2021-05-02 20:33:47,160 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 [2021-05-02 20:33:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:47,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:33:47,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:47,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:33:47,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:47,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831793727] [2021-05-02 20:33:47,421 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:47,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403958771] [2021-05-02 20:33:47,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403958771] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:47,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:47,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:33:47,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854917041] [2021-05-02 20:33:47,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:33:47,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:47,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:33:47,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:47,422 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:33:47,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:47,530 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2021-05-02 20:33:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:33:47,531 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-02 20:33:47,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:47,532 INFO L225 Difference]: With dead ends: 77 [2021-05-02 20:33:47,532 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 20:33:47,532 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:47,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 20:33:47,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-05-02 20:33:47,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:33:47,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-02 20:33:47,539 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-02 20:33:47,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:47,540 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-02 20:33:47,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:33:47,540 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-02 20:33:47,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:33:47,541 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:47,541 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:47,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:47,765 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:47,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:47,765 INFO L82 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2021-05-02 20:33:47,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:47,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343525375] [2021-05-02 20:33:47,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:47,778 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:47,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796966026] [2021-05-02 20:33:47,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:47,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:33:47,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:47,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:47,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,023 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:33:48,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:48,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343525375] [2021-05-02 20:33:48,023 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:48,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796966026] [2021-05-02 20:33:48,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796966026] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:48,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:48,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:33:48,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241764855] [2021-05-02 20:33:48,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:33:48,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:48,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:33:48,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:48,025 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:33:48,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:48,197 INFO L93 Difference]: Finished difference Result 109 states and 145 transitions. [2021-05-02 20:33:48,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:33:48,197 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-05-02 20:33:48,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:48,198 INFO L225 Difference]: With dead ends: 109 [2021-05-02 20:33:48,198 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 20:33:48,199 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:48,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 20:33:48,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-05-02 20:33:48,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 20:33:48,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2021-05-02 20:33:48,208 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2021-05-02 20:33:48,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:48,208 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2021-05-02 20:33:48,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:33:48,208 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2021-05-02 20:33:48,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:33:48,209 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:48,209 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:48,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:33:48,427 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:48,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:48,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2021-05-02 20:33:48,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:48,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586459418] [2021-05-02 20:33:48,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:48,450 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:48,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120322091] [2021-05-02 20:33:48,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:48,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:33:48,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:48,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:33:48,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:48,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586459418] [2021-05-02 20:33:48,630 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:48,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120322091] [2021-05-02 20:33:48,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120322091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:48,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:48,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:33:48,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749204443] [2021-05-02 20:33:48,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:33:48,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:48,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:33:48,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:48,632 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:33:48,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:48,773 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2021-05-02 20:33:48,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:33:48,774 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-02 20:33:48,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:48,775 INFO L225 Difference]: With dead ends: 116 [2021-05-02 20:33:48,775 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 20:33:48,775 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:33:48,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 20:33:48,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-02 20:33:48,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.25) internal successors, (95), 77 states have internal predecessors, (95), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 20:33:48,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 155 transitions. [2021-05-02 20:33:48,782 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 155 transitions. Word has length 47 [2021-05-02 20:33:48,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:48,783 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 155 transitions. [2021-05-02 20:33:48,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:33:48,783 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 155 transitions. [2021-05-02 20:33:48,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:33:48,784 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:48,784 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:48,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:48,989 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:48,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:48,989 INFO L82 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2021-05-02 20:33:48,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:48,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345745648] [2021-05-02 20:33:48,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:48,999 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:49,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786813482] [2021-05-02 20:33:49,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:49,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 20:33:49,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:49,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:33:49,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:49,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345745648] [2021-05-02 20:33:49,303 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:49,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786813482] [2021-05-02 20:33:49,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786813482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:49,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:49,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:33:49,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058808677] [2021-05-02 20:33:49,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:33:49,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:49,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:33:49,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:33:49,305 INFO L87 Difference]: Start difference. First operand 115 states and 155 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:33:49,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:49,541 INFO L93 Difference]: Finished difference Result 122 states and 161 transitions. [2021-05-02 20:33:49,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:33:49,541 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2021-05-02 20:33:49,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:49,544 INFO L225 Difference]: With dead ends: 122 [2021-05-02 20:33:49,544 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 20:33:49,544 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:33:49,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 20:33:49,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2021-05-02 20:33:49,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 79 states have (on average 1.240506329113924) internal successors, (98), 80 states have internal predecessors, (98), 31 states have call successors, (31), 9 states have call predecessors, (31), 8 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 20:33:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 158 transitions. [2021-05-02 20:33:49,563 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 158 transitions. Word has length 47 [2021-05-02 20:33:49,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:49,563 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 158 transitions. [2021-05-02 20:33:49,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:33:49,563 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 158 transitions. [2021-05-02 20:33:49,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:33:49,569 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:49,569 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:49,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:49,769 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:49,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:49,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2021-05-02 20:33:49,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:49,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355725395] [2021-05-02 20:33:49,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:49,780 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:49,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075471845] [2021-05-02 20:33:49,781 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 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 [2021-05-02 20:33:49,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:49,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:49,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:33:49,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:49,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:33:49,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:49,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355725395] [2021-05-02 20:33:49,931 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:49,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075471845] [2021-05-02 20:33:49,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075471845] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:33:49,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:33:49,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:33:49,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610319289] [2021-05-02 20:33:49,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:33:49,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:49,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:33:49,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:33:49,934 INFO L87 Difference]: Start difference. First operand 119 states and 158 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:33:50,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:50,000 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2021-05-02 20:33:50,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:33:50,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-05-02 20:33:50,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:50,006 INFO L225 Difference]: With dead ends: 130 [2021-05-02 20:33:50,006 INFO L226 Difference]: Without dead ends: 130 [2021-05-02 20:33:50,006 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:33:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-02 20:33:50,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2021-05-02 20:33:50,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 69 states have internal predecessors, (81), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 20:33:50,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2021-05-02 20:33:50,018 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 47 [2021-05-02 20:33:50,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:50,021 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2021-05-02 20:33:50,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:33:50,021 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2021-05-02 20:33:50,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 20:33:50,023 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:50,023 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:50,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:33:50,234 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:50,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:50,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2021-05-02 20:33:50,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:50,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531865585] [2021-05-02 20:33:50,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:50,264 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:50,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22080023] [2021-05-02 20:33:50,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:50,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:33:50,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:50,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-02 20:33:50,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:50,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531865585] [2021-05-02 20:33:50,435 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:50,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22080023] [2021-05-02 20:33:50,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22080023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:50,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:50,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:33:50,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933808358] [2021-05-02 20:33:50,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:33:50,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:50,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:33:50,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:33:50,437 INFO L87 Difference]: Start difference. First operand 104 states and 133 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 20:33:50,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:50,523 INFO L93 Difference]: Finished difference Result 152 states and 209 transitions. [2021-05-02 20:33:50,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:33:50,523 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-05-02 20:33:50,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:50,525 INFO L225 Difference]: With dead ends: 152 [2021-05-02 20:33:50,525 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 20:33:50,525 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:33:50,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 20:33:50,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2021-05-02 20:33:50,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 82 states have internal predecessors, (89), 47 states have call successors, (47), 10 states have call predecessors, (47), 9 states have return successors, (45), 40 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 20:33:50,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 181 transitions. [2021-05-02 20:33:50,537 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 181 transitions. Word has length 52 [2021-05-02 20:33:50,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:50,537 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 181 transitions. [2021-05-02 20:33:50,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 20:33:50,538 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 181 transitions. [2021-05-02 20:33:50,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 20:33:50,539 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:50,539 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:50,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:50,753 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:50,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:50,754 INFO L82 PathProgramCache]: Analyzing trace with hash 846041443, now seen corresponding path program 1 times [2021-05-02 20:33:50,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:50,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017477921] [2021-05-02 20:33:50,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:50,765 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:50,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864740743] [2021-05-02 20:33:50,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:50,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:33:50,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:50,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:33:50,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:50,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017477921] [2021-05-02 20:33:50,978 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:50,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864740743] [2021-05-02 20:33:50,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864740743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:50,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:50,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:33:50,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033780021] [2021-05-02 20:33:50,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:33:50,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:50,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:33:50,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:33:50,979 INFO L87 Difference]: Start difference. First operand 133 states and 181 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:33:51,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:51,272 INFO L93 Difference]: Finished difference Result 183 states and 259 transitions. [2021-05-02 20:33:51,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:33:51,273 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 52 [2021-05-02 20:33:51,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:51,275 INFO L225 Difference]: With dead ends: 183 [2021-05-02 20:33:51,275 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 20:33:51,275 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:33:51,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 20:33:51,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 148. [2021-05-02 20:33:51,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 82 states have (on average 1.170731707317073) internal successors, (96), 89 states have internal predecessors, (96), 55 states have call successors, (55), 11 states have call predecessors, (55), 10 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-02 20:33:51,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 204 transitions. [2021-05-02 20:33:51,284 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 204 transitions. Word has length 52 [2021-05-02 20:33:51,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:51,285 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 204 transitions. [2021-05-02 20:33:51,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:33:51,285 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 204 transitions. [2021-05-02 20:33:51,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 20:33:51,286 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:51,286 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:51,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:51,493 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:51,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:51,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2021-05-02 20:33:51,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:51,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671335336] [2021-05-02 20:33:51,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:51,502 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:51,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297380335] [2021-05-02 20:33:51,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:51,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 20:33:51,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:51,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:51,952 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 20:33:51,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:51,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671335336] [2021-05-02 20:33:51,953 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:51,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297380335] [2021-05-02 20:33:51,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297380335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:51,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:51,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 20:33:51,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568419660] [2021-05-02 20:33:51,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 20:33:51,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:51,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 20:33:51,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:33:51,955 INFO L87 Difference]: Start difference. First operand 148 states and 204 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:33:52,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:52,534 INFO L93 Difference]: Finished difference Result 186 states and 251 transitions. [2021-05-02 20:33:52,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:33:52,535 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2021-05-02 20:33:52,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:52,536 INFO L225 Difference]: With dead ends: 186 [2021-05-02 20:33:52,536 INFO L226 Difference]: Without dead ends: 185 [2021-05-02 20:33:52,537 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 444.1ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-02 20:33:52,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-02 20:33:52,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2021-05-02 20:33:52,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 106 states have (on average 1.1603773584905661) internal successors, (123), 113 states have internal predecessors, (123), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-02 20:33:52,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 247 transitions. [2021-05-02 20:33:52,546 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 247 transitions. Word has length 64 [2021-05-02 20:33:52,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:52,546 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 247 transitions. [2021-05-02 20:33:52,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:33:52,547 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 247 transitions. [2021-05-02 20:33:52,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:33:52,547 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:52,548 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:52,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:33:52,765 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:52,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:52,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1523533001, now seen corresponding path program 2 times [2021-05-02 20:33:52,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:52,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497622487] [2021-05-02 20:33:52,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:52,780 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:52,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138545615] [2021-05-02 20:33:52,780 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:52,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:33:52,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:33:52,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 20:33:52,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:52,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 20:33:52,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:52,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497622487] [2021-05-02 20:33:52,981 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:52,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138545615] [2021-05-02 20:33:52,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138545615] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:52,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:52,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:33:52,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275335374] [2021-05-02 20:33:52,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:33:52,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:52,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:33:52,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:33:52,983 INFO L87 Difference]: Start difference. First operand 183 states and 247 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:33:53,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:53,259 INFO L93 Difference]: Finished difference Result 320 states and 476 transitions. [2021-05-02 20:33:53,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:33:53,260 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-05-02 20:33:53,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:53,263 INFO L225 Difference]: With dead ends: 320 [2021-05-02 20:33:53,264 INFO L226 Difference]: Without dead ends: 320 [2021-05-02 20:33:53,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:33:53,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-02 20:33:53,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 217. [2021-05-02 20:33:53,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 128 states have (on average 1.1953125) internal successors, (153), 134 states have internal predecessors, (153), 75 states have call successors, (75), 14 states have call predecessors, (75), 13 states have return successors, (73), 68 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 20:33:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 301 transitions. [2021-05-02 20:33:53,283 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 301 transitions. Word has length 69 [2021-05-02 20:33:53,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:53,283 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 301 transitions. [2021-05-02 20:33:53,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:33:53,283 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 301 transitions. [2021-05-02 20:33:53,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 20:33:53,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:53,284 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:53,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:33:53,501 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:53,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:53,501 INFO L82 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2021-05-02 20:33:53,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:53,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776128070] [2021-05-02 20:33:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:53,509 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:53,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090892009] [2021-05-02 20:33:53,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:53,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 20:33:53,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:53,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:53,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:53,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:53,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:53,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:53,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:53,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:53,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:53,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:53,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:53,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:53,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:53,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:53,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:53,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:53,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:53,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:53,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 20:33:53,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:53,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776128070] [2021-05-02 20:33:53,761 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:53,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090892009] [2021-05-02 20:33:53,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090892009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:53,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:53,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:33:53,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071849626] [2021-05-02 20:33:53,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:33:53,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:53,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:33:53,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:33:53,762 INFO L87 Difference]: Start difference. First operand 217 states and 301 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 20:33:53,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:33:53,946 INFO L93 Difference]: Finished difference Result 246 states and 341 transitions. [2021-05-02 20:33:53,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:33:53,947 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2021-05-02 20:33:53,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:33:53,948 INFO L225 Difference]: With dead ends: 246 [2021-05-02 20:33:53,949 INFO L226 Difference]: Without dead ends: 246 [2021-05-02 20:33:53,949 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:33:53,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-02 20:33:53,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2021-05-02 20:33:53,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 144 states have internal predecessors, (163), 83 states have call successors, (83), 16 states have call predecessors, (83), 15 states have return successors, (81), 75 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-02 20:33:53,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 327 transitions. [2021-05-02 20:33:53,961 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 327 transitions. Word has length 74 [2021-05-02 20:33:53,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:33:53,962 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 327 transitions. [2021-05-02 20:33:53,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 20:33:53,962 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 327 transitions. [2021-05-02 20:33:53,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 20:33:53,962 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:33:53,963 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:33:54,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:33:54,184 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:33:54,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:33:54,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2021-05-02 20:33:54,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:33:54,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566820676] [2021-05-02 20:33:54,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:33:54,192 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:33:54,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520406948] [2021-05-02 20:33:54,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:33:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:33:54,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:33:54,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:33:54,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 20:33:54,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:33:54,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566820676] [2021-05-02 20:33:54,787 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:33:54,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520406948] [2021-05-02 20:33:54,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520406948] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:33:54,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:33:54,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:33:54,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795672086] [2021-05-02 20:33:54,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:33:54,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:33:54,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:33:54,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:33:54,788 INFO L87 Difference]: Start difference. First operand 236 states and 327 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:33:55,707 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-02 20:33:58,043 WARN L205 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-02 20:33:58,371 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-05-02 20:33:58,702 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-02 20:34:00,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:00,507 INFO L93 Difference]: Finished difference Result 369 states and 532 transitions. [2021-05-02 20:34:00,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 20:34:00,508 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 72 [2021-05-02 20:34:00,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:00,510 INFO L225 Difference]: With dead ends: 369 [2021-05-02 20:34:00,510 INFO L226 Difference]: Without dead ends: 369 [2021-05-02 20:34:00,511 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 4153.8ms TimeCoverageRelationStatistics Valid=417, Invalid=1935, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 20:34:00,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-02 20:34:00,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 345. [2021-05-02 20:34:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 196 states have (on average 1.2142857142857142) internal successors, (238), 208 states have internal predecessors, (238), 131 states have call successors, (131), 18 states have call predecessors, (131), 17 states have return successors, (129), 118 states have call predecessors, (129), 129 states have call successors, (129) [2021-05-02 20:34:00,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 498 transitions. [2021-05-02 20:34:00,526 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 498 transitions. Word has length 72 [2021-05-02 20:34:00,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:00,527 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 498 transitions. [2021-05-02 20:34:00,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:34:00,527 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 498 transitions. [2021-05-02 20:34:00,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 20:34:00,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:00,528 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:00,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:00,749 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:00,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:00,749 INFO L82 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2021-05-02 20:34:00,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:00,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133055374] [2021-05-02 20:34:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:00,759 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:00,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532387903] [2021-05-02 20:34:00,759 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:00,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:34:00,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:34:00,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 20:34:00,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:00,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 20:34:00,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:00,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133055374] [2021-05-02 20:34:00,977 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:00,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532387903] [2021-05-02 20:34:00,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532387903] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:00,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:00,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:34:00,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964142073] [2021-05-02 20:34:00,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:34:00,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:00,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:34:00,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:34:00,978 INFO L87 Difference]: Start difference. First operand 345 states and 498 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 20:34:01,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:01,016 INFO L93 Difference]: Finished difference Result 326 states and 449 transitions. [2021-05-02 20:34:01,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:34:01,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2021-05-02 20:34:01,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:01,018 INFO L225 Difference]: With dead ends: 326 [2021-05-02 20:34:01,018 INFO L226 Difference]: Without dead ends: 326 [2021-05-02 20:34:01,018 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:34:01,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-02 20:34:01,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 299. [2021-05-02 20:34:01,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 175 states have (on average 1.2) internal successors, (210), 178 states have internal predecessors, (210), 107 states have call successors, (107), 17 states have call predecessors, (107), 16 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-05-02 20:34:01,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 422 transitions. [2021-05-02 20:34:01,028 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 422 transitions. Word has length 77 [2021-05-02 20:34:01,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:01,029 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 422 transitions. [2021-05-02 20:34:01,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 20:34:01,029 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 422 transitions. [2021-05-02 20:34:01,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 20:34:01,030 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:01,030 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:01,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:34:01,249 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:01,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:01,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1813106047, now seen corresponding path program 3 times [2021-05-02 20:34:01,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:01,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005774918] [2021-05-02 20:34:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:01,257 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:01,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007280101] [2021-05-02 20:34:01,258 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:01,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:34:01,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:34:01,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 20:34:01,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:01,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,469 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-05-02 20:34:01,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:01,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005774918] [2021-05-02 20:34:01,470 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:01,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007280101] [2021-05-02 20:34:01,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007280101] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:01,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:01,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 20:34:01,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029130399] [2021-05-02 20:34:01,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:34:01,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:01,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:34:01,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:34:01,474 INFO L87 Difference]: Start difference. First operand 299 states and 422 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 20:34:01,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:01,554 INFO L93 Difference]: Finished difference Result 340 states and 487 transitions. [2021-05-02 20:34:01,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:34:01,555 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2021-05-02 20:34:01,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:01,556 INFO L225 Difference]: With dead ends: 340 [2021-05-02 20:34:01,557 INFO L226 Difference]: Without dead ends: 340 [2021-05-02 20:34:01,557 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:34:01,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-02 20:34:01,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 333. [2021-05-02 20:34:01,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 188 states have (on average 1.2127659574468086) internal successors, (228), 191 states have internal predecessors, (228), 127 states have call successors, (127), 18 states have call predecessors, (127), 17 states have return successors, (125), 123 states have call predecessors, (125), 125 states have call successors, (125) [2021-05-02 20:34:01,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 480 transitions. [2021-05-02 20:34:01,568 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 480 transitions. Word has length 77 [2021-05-02 20:34:01,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:01,569 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 480 transitions. [2021-05-02 20:34:01,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 20:34:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 480 transitions. [2021-05-02 20:34:01,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 20:34:01,570 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:01,570 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:01,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:34:01,795 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:01,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:01,795 INFO L82 PathProgramCache]: Analyzing trace with hash -747783847, now seen corresponding path program 1 times [2021-05-02 20:34:01,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:01,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852143323] [2021-05-02 20:34:01,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:01,800 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:01,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319635796] [2021-05-02 20:34:01,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:01,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:34:01,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:01,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:01,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,084 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 20:34:02,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:02,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852143323] [2021-05-02 20:34:02,085 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:02,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319635796] [2021-05-02 20:34:02,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319635796] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:02,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:02,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:34:02,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948247076] [2021-05-02 20:34:02,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:34:02,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:02,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:34:02,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:34:02,086 INFO L87 Difference]: Start difference. First operand 333 states and 480 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:34:02,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:02,475 INFO L93 Difference]: Finished difference Result 440 states and 639 transitions. [2021-05-02 20:34:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:34:02,475 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2021-05-02 20:34:02,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:02,478 INFO L225 Difference]: With dead ends: 440 [2021-05-02 20:34:02,478 INFO L226 Difference]: Without dead ends: 440 [2021-05-02 20:34:02,478 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-05-02 20:34:02,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-05-02 20:34:02,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 351. [2021-05-02 20:34:02,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 196 states have (on average 1.2040816326530612) internal successors, (236), 201 states have internal predecessors, (236), 135 states have call successors, (135), 20 states have call predecessors, (135), 19 states have return successors, (133), 129 states have call predecessors, (133), 133 states have call successors, (133) [2021-05-02 20:34:02,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 504 transitions. [2021-05-02 20:34:02,506 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 504 transitions. Word has length 79 [2021-05-02 20:34:02,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:02,506 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 504 transitions. [2021-05-02 20:34:02,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:34:02,506 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 504 transitions. [2021-05-02 20:34:02,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 20:34:02,507 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:02,507 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:02,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:34:02,729 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:02,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:02,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 4 times [2021-05-02 20:34:02,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:02,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993312671] [2021-05-02 20:34:02,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:02,743 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:02,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415506258] [2021-05-02 20:34:02,744 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:02,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:34:02,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:34:02,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 87 conjunts are in the unsatisfiable core [2021-05-02 20:34:02,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:02,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:02,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:03,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:03,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993312671] [2021-05-02 20:34:03,593 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:03,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415506258] [2021-05-02 20:34:03,593 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-02 20:34:03,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:03,816 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Infinite/NaN value at de.uni_freiburg.informatik.ultimate.logic.Theory.constant(Theory.java:446) at de.uni_freiburg.informatik.ultimate.logic.Rational.toTerm(Rational.java:921) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.div(SmtUtils.java:1578) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termWithLocalSimplification(SmtUtils.java:1391) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termWithLocalSimplification(SmtUtils.java:1321) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.convertApplicationTerm(SmtUtils.java:1310) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SubstitutionWithLocalSimplification.convertApplicationTerm(SubstitutionWithLocalSimplification.java:49) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:339) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.doSubstitutions(DualJunctionDer.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperSbr.applyReplacement(DualJunctionDer.java:386) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:333) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:231) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:149) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:127) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:869) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:835) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:753) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:384) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:465) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:612) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-02 20:34:03,820 INFO L168 Benchmark]: Toolchain (without parser) took 19908.55 ms. Allocated memory was 181.4 MB in the beginning and 292.6 MB in the end (delta: 111.1 MB). Free memory was 146.2 MB in the beginning and 265.6 MB in the end (delta: -119.3 MB). Peak memory consumption was 156.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:03,820 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 181.4 MB. Free memory is still 162.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:34:03,820 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.51 ms. Allocated memory is still 181.4 MB. Free memory was 146.0 MB in the beginning and 164.1 MB in the end (delta: -18.1 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:03,821 INFO L168 Benchmark]: Boogie Preprocessor took 40.55 ms. Allocated memory is still 181.4 MB. Free memory was 164.1 MB in the beginning and 162.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:03,821 INFO L168 Benchmark]: RCFGBuilder took 388.71 ms. Allocated memory is still 181.4 MB. Free memory was 162.7 MB in the beginning and 145.7 MB in the end (delta: 17.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:03,821 INFO L168 Benchmark]: IcfgTransformer took 34.57 ms. Allocated memory is still 181.4 MB. Free memory was 145.7 MB in the beginning and 144.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:03,821 INFO L168 Benchmark]: TraceAbstraction took 19120.39 ms. Allocated memory was 181.4 MB in the beginning and 292.6 MB in the end (delta: 111.1 MB). Free memory was 143.8 MB in the beginning and 265.6 MB in the end (delta: -121.8 MB). Peak memory consumption was 153.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:03,821 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 181.4 MB. Free memory is still 162.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 317.51 ms. Allocated memory is still 181.4 MB. Free memory was 146.0 MB in the beginning and 164.1 MB in the end (delta: -18.1 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.55 ms. Allocated memory is still 181.4 MB. Free memory was 164.1 MB in the beginning and 162.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 388.71 ms. Allocated memory is still 181.4 MB. Free memory was 162.7 MB in the beginning and 145.7 MB in the end (delta: 17.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 34.57 ms. Allocated memory is still 181.4 MB. Free memory was 145.7 MB in the beginning and 144.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 19120.39 ms. Allocated memory was 181.4 MB in the beginning and 292.6 MB in the end (delta: 111.1 MB). Free memory was 143.8 MB in the beginning and 265.6 MB in the end (delta: -121.8 MB). Peak memory consumption was 153.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Infinite/NaN value de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Infinite/NaN value: de.uni_freiburg.informatik.ultimate.logic.Theory.constant(Theory.java:446) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...