/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/egcd2-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:22:55,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:22:55,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:22:55,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:22:55,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:22:55,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:22:55,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:22:55,924 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:22:55,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:22:55,928 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:22:55,929 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:22:55,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:22:55,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:22:55,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:22:55,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:22:55,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:22:55,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:22:55,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:22:55,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:22:55,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:22:55,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:22:55,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:22:55,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:22:55,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:22:55,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:22:55,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:22:55,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:22:55,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:22:55,962 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:22:55,975 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:22:55,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:22:55,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:22:55,978 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:22:55,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:22:55,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:22:55,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:22:55,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:22:55,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:22:55,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:22:55,979 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:22:55,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:22:55,980 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:22:55,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:22:55,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:22:55,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:22:55,980 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:22:55,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:22:55,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:22:55,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:22:55,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:22:55,981 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:22:55,982 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:22:56,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:22:56,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:22:56,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:22:56,251 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:22:56,251 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:22:56,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c [2021-05-02 20:22:56,290 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52c2afbb5/c9f0a8d28ad142888f7abd1c73dfe848/FLAG6014f5b6f [2021-05-02 20:22:56,618 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:22:56,618 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c [2021-05-02 20:22:56,623 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52c2afbb5/c9f0a8d28ad142888f7abd1c73dfe848/FLAG6014f5b6f [2021-05-02 20:22:57,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52c2afbb5/c9f0a8d28ad142888f7abd1c73dfe848 [2021-05-02 20:22:57,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:22:57,036 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:22:57,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:22:57,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:22:57,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:22:57,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:22:57" (1/1) ... [2021-05-02 20:22:57,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@520949ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:57, skipping insertion in model container [2021-05-02 20:22:57,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:22:57" (1/1) ... [2021-05-02 20:22:57,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:22:57,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:22:57,131 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/egcd2-ll_valuebound100.c[490,503] [2021-05-02 20:22:57,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:22:57,146 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:22:57,174 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/egcd2-ll_valuebound100.c[490,503] [2021-05-02 20:22:57,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:22:57,192 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:22:57,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:57 WrapperNode [2021-05-02 20:22:57,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:22:57,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:22:57,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:22:57,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:22:57,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:57" (1/1) ... [2021-05-02 20:22:57,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:57" (1/1) ... [2021-05-02 20:22:57,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:57" (1/1) ... [2021-05-02 20:22:57,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:57" (1/1) ... [2021-05-02 20:22:57,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:57" (1/1) ... [2021-05-02 20:22:57,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:57" (1/1) ... [2021-05-02 20:22:57,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:57" (1/1) ... [2021-05-02 20:22:57,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:22:57,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:22:57,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:22:57,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:22:57,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:57" (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 20:22:57,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:22:57,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:22:57,276 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:22:57,276 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:22:57,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:22:57,276 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:22:57,276 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:22:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:22:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:22:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:22:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:22:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:22:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:22:57,277 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:22:57,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:22:57,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:22:57,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:22:57,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:22:57,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:22:57,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:22:57,437 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:22:57,438 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:22:57,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:22:57 BoogieIcfgContainer [2021-05-02 20:22:57,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:22:57,439 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:22:57,439 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:22:57,440 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:22:57,441 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:22:57" (1/1) ... [2021-05-02 20:22:57,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:22:57 BasicIcfg [2021-05-02 20:22:57,469 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:22:57,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:22:57,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:22:57,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:22:57,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:22:57" (1/4) ... [2021-05-02 20:22:57,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26337fad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:22:57, skipping insertion in model container [2021-05-02 20:22:57,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:57" (2/4) ... [2021-05-02 20:22:57,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26337fad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:22:57, skipping insertion in model container [2021-05-02 20:22:57,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:22:57" (3/4) ... [2021-05-02 20:22:57,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26337fad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:22:57, skipping insertion in model container [2021-05-02 20:22:57,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:22:57" (4/4) ... [2021-05-02 20:22:57,474 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound100.cJordan [2021-05-02 20:22:57,477 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:22:57,479 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:22:57,494 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:22:57,523 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:22:57,523 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:22:57,523 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:22:57,523 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:22:57,523 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:22:57,523 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:22:57,523 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:22:57,523 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:22:57,550 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 20:22:57,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:22:57,563 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:22:57,563 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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 20:22:57,563 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:22:57,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:22:57,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2021-05-02 20:22:57,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:22:57,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421795992] [2021-05-02 20:22:57,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:22:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:57,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:22:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:57,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:22:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:57,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:22:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:57,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:22:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:57,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:22:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:57,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-02 20:22:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:57,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-02 20:22:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:57,793 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 20:22:57,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:22:57,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421795992] [2021-05-02 20:22:57,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421795992] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:22:57,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:22:57,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:22:57,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611289819] [2021-05-02 20:22:57,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:22:57,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:22:57,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:22:57,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:22:57,807 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:22:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:22:57,883 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-02 20:22:57,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:22:57,885 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-02 20:22:57,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:22:57,889 INFO L225 Difference]: With dead ends: 40 [2021-05-02 20:22:57,889 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:22:57,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:22:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:22:57,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:22:57,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 20:22:57,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-02 20:22:57,911 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-02 20:22:57,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:22:57,911 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-02 20:22:57,911 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:22:57,911 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-02 20:22:57,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 20:22:57,913 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:22:57,913 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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 20:22:57,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:22:57,913 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:22:57,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:22:57,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2021-05-02 20:22:57,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:22:57,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913574727] [2021-05-02 20:22:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:22:57,926 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:22:57,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455610308] [2021-05-02 20:22:57,926 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 20:22:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:57,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:22:58,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:22:58,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:58,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:58,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:58,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:58,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 20:22:58,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:22:58,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913574727] [2021-05-02 20:22:58,157 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:22:58,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455610308] [2021-05-02 20:22:58,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455610308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:22:58,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:22:58,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:22:58,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138423827] [2021-05-02 20:22:58,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:22:58,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:22:58,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:22:58,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:22:58,159 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 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 20:22:58,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:22:58,250 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-05-02 20:22:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:22:58,251 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), 3 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 44 [2021-05-02 20:22:58,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:22:58,252 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:22:58,252 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:22:58,252 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:22:58,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:22:58,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 20:22:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 20:22:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-02 20:22:58,257 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-02 20:22:58,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:22:58,258 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-02 20:22:58,258 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), 3 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 20:22:58,258 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-02 20:22:58,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 20:22:58,259 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:22:58,259 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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 20:22:58,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:22:58,469 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:22:58,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:22:58,469 INFO L82 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2021-05-02 20:22:58,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:22:58,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382000947] [2021-05-02 20:22:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:22:58,484 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:22:58,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197874847] [2021-05-02 20:22:58,484 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 20:22:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:58,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:22:58,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:22:58,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:58,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:58,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:58,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:58,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:58,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:58,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:58,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:22:58,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:22:58,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382000947] [2021-05-02 20:22:58,666 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:22:58,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197874847] [2021-05-02 20:22:58,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197874847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:22:58,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:22:58,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:22:58,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674500361] [2021-05-02 20:22:58,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:22:58,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:22:58,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:22:58,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:22:58,673 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 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 20:22:58,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:22:58,787 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-05-02 20:22:58,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:22:58,787 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 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 45 [2021-05-02 20:22:58,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:22:58,789 INFO L225 Difference]: With dead ends: 55 [2021-05-02 20:22:58,789 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 20:22:58,790 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:22:58,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 20:22:58,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-02 20:22:58,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:22:58,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-02 20:22:58,804 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-02 20:22:58,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:22:58,804 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-02 20:22:58,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 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 20:22:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-02 20:22:58,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 20:22:58,806 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:22:58,806 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-05-02 20:22:59,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:22:59,009 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:22:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:22:59,009 INFO L82 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2021-05-02 20:22:59,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:22:59,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434694163] [2021-05-02 20:22:59,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:22:59,019 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:22:59,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184544519] [2021-05-02 20:22:59,019 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 20:22:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:59,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:22:59,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:22:59,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:22:59,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:22:59,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434694163] [2021-05-02 20:22:59,234 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:22:59,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184544519] [2021-05-02 20:22:59,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184544519] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:22:59,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:22:59,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:22:59,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646955599] [2021-05-02 20:22:59,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:22:59,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:22:59,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:22:59,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:22:59,236 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:22:59,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:22:59,338 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-02 20:22:59,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:22:59,339 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2021-05-02 20:22:59,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:22:59,341 INFO L225 Difference]: With dead ends: 54 [2021-05-02 20:22:59,341 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 20:22:59,341 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:22:59,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 20:22:59,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 20:22:59,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:22:59,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-02 20:22:59,345 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-02 20:22:59,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:22:59,345 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-02 20:22:59,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:22:59,345 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-02 20:22:59,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 20:22:59,346 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:22:59,346 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2021-05-02 20:22:59,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:22:59,562 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:22:59,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:22:59,562 INFO L82 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2021-05-02 20:22:59,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:22:59,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453994681] [2021-05-02 20:22:59,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:22:59,579 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:22:59,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070490423] [2021-05-02 20:22:59,579 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 20:22:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:59,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:22:59,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:22:59,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 20:22:59,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:22:59,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453994681] [2021-05-02 20:22:59,781 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:22:59,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070490423] [2021-05-02 20:22:59,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070490423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:22:59,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:22:59,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:22:59,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109920431] [2021-05-02 20:22:59,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:22:59,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:22:59,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:22:59,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:22:59,782 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:22:59,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:22:59,882 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2021-05-02 20:22:59,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:22:59,883 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-02 20:22:59,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:22:59,886 INFO L225 Difference]: With dead ends: 58 [2021-05-02 20:22:59,886 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:22:59,886 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:22:59,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:22:59,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 20:22:59,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:22:59,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-02 20:22:59,898 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-02 20:22:59,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:22:59,899 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-02 20:22:59,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:22:59,899 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-02 20:22:59,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 20:22:59,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:22:59,903 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2021-05-02 20:23:00,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:00,119 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:00,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:00,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2021-05-02 20:23:00,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:00,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914847044] [2021-05-02 20:23:00,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:00,129 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:00,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152415287] [2021-05-02 20:23:00,129 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 20:23:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:23:00,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:23:00,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:00,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-05-02 20:23:00,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:00,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914847044] [2021-05-02 20:23:00,341 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:00,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152415287] [2021-05-02 20:23:00,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152415287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:00,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:00,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:23:00,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848790935] [2021-05-02 20:23:00,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:23:00,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:00,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:23:00,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:23:00,345 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 20:23:04,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:04,564 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-05-02 20:23:04,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:23:04,565 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 60 [2021-05-02 20:23:04,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:04,565 INFO L225 Difference]: With dead ends: 62 [2021-05-02 20:23:04,565 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 20:23:04,566 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:23:04,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 20:23:04,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 20:23:04,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:23:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-02 20:23:04,570 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-02 20:23:04,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:04,570 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-02 20:23:04,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 20:23:04,570 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-02 20:23:04,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 20:23:04,571 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:04,571 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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] [2021-05-02 20:23:04,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:23:04,786 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:04,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:04,787 INFO L82 PathProgramCache]: Analyzing trace with hash 14033329, now seen corresponding path program 1 times [2021-05-02 20:23:04,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:04,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845510913] [2021-05-02 20:23:04,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:04,795 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:04,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843543637] [2021-05-02 20:23:04,795 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 20:23:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:23:04,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:23:04,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:04,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-02 20:23:04,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:04,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845510913] [2021-05-02 20:23:04,942 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:04,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843543637] [2021-05-02 20:23:04,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843543637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:04,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:04,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:23:04,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744444491] [2021-05-02 20:23:04,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:23:04,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:04,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:23:04,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:23:04,944 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (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 20:23:05,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:05,057 INFO L93 Difference]: Finished difference Result 89 states and 120 transitions. [2021-05-02 20:23:05,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:23:05,058 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (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 67 [2021-05-02 20:23:05,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:05,058 INFO L225 Difference]: With dead ends: 89 [2021-05-02 20:23:05,058 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 20:23:05,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:23:05,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 20:23:05,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2021-05-02 20:23:05,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 45 states have internal predecessors, (48), 28 states have call successors, (28), 9 states have call predecessors, (28), 8 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 20:23:05,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-02 20:23:05,063 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 67 [2021-05-02 20:23:05,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:05,063 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-02 20:23:05,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (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 20:23:05,064 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-02 20:23:05,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:23:05,064 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:05,064 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:23:05,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:05,284 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:05,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:05,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2021-05-02 20:23:05,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:05,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737400361] [2021-05-02 20:23:05,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:05,293 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:05,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757241340] [2021-05-02 20:23:05,293 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 20:23:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:23:05,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:23:05,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:05,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-02 20:23:05,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:05,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737400361] [2021-05-02 20:23:05,447 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:05,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757241340] [2021-05-02 20:23:05,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757241340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:05,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:05,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:23:05,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422194839] [2021-05-02 20:23:05,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:23:05,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:05,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:23:05,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:23:05,448 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:23:05,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:05,573 INFO L93 Difference]: Finished difference Result 116 states and 163 transitions. [2021-05-02 20:23:05,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:23:05,574 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 20:23:05,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:05,575 INFO L225 Difference]: With dead ends: 116 [2021-05-02 20:23:05,575 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 20:23:05,575 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:23:05,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 20:23:05,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2021-05-02 20:23:05,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 59 states have internal predecessors, (65), 41 states have call successors, (41), 9 states have call predecessors, (41), 8 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 20:23:05,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 145 transitions. [2021-05-02 20:23:05,581 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 145 transitions. Word has length 69 [2021-05-02 20:23:05,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:05,582 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 145 transitions. [2021-05-02 20:23:05,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:23:05,582 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 145 transitions. [2021-05-02 20:23:05,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 20:23:05,582 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:05,582 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1] [2021-05-02 20:23:05,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:05,797 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:05,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:05,797 INFO L82 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2021-05-02 20:23:05,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:05,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786374600] [2021-05-02 20:23:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:05,805 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:05,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714733524] [2021-05-02 20:23:05,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:23:05,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:23:05,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:05,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-05-02 20:23:06,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:06,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786374600] [2021-05-02 20:23:06,063 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:06,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714733524] [2021-05-02 20:23:06,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714733524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:06,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:06,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:23:06,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543644671] [2021-05-02 20:23:06,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:23:06,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:06,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:23:06,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:23:06,066 INFO L87 Difference]: Start difference. First operand 105 states and 145 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:23:06,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:06,244 INFO L93 Difference]: Finished difference Result 148 states and 211 transitions. [2021-05-02 20:23:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:23:06,244 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2021-05-02 20:23:06,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:06,245 INFO L225 Difference]: With dead ends: 148 [2021-05-02 20:23:06,246 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 20:23:06,246 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:23:06,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 20:23:06,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-05-02 20:23:06,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 81 states have internal predecessors, (89), 60 states have call successors, (60), 10 states have call predecessors, (60), 9 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 20:23:06,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 206 transitions. [2021-05-02 20:23:06,253 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 206 transitions. Word has length 75 [2021-05-02 20:23:06,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:06,253 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 206 transitions. [2021-05-02 20:23:06,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:23:06,253 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 206 transitions. [2021-05-02 20:23:06,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:23:06,254 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:06,254 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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, 1, 1] [2021-05-02 20:23:06,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:23:06,466 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:06,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:06,466 INFO L82 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 2 times [2021-05-02 20:23:06,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:06,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319119816] [2021-05-02 20:23:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:06,474 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:06,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014657172] [2021-05-02 20:23:06,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:06,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:23:06,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:06,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 20:23:06,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:06,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-05-02 20:23:06,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:06,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319119816] [2021-05-02 20:23:06,717 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:06,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014657172] [2021-05-02 20:23:06,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014657172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:06,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:06,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:23:06,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706964750] [2021-05-02 20:23:06,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:23:06,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:06,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:23:06,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:23:06,719 INFO L87 Difference]: Start difference. First operand 144 states and 206 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:23:06,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:06,883 INFO L93 Difference]: Finished difference Result 150 states and 211 transitions. [2021-05-02 20:23:06,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:23:06,883 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2021-05-02 20:23:06,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:06,886 INFO L225 Difference]: With dead ends: 150 [2021-05-02 20:23:06,887 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 20:23:06,887 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:23:06,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 20:23:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-05-02 20:23:06,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 84 states have internal predecessors, (92), 60 states have call successors, (60), 11 states have call predecessors, (60), 10 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 20:23:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 209 transitions. [2021-05-02 20:23:06,904 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 209 transitions. Word has length 80 [2021-05-02 20:23:06,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:06,905 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 209 transitions. [2021-05-02 20:23:06,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:23:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 209 transitions. [2021-05-02 20:23:06,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 20:23:06,906 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:06,906 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1, 1] [2021-05-02 20:23:07,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:07,113 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:07,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:07,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 3 times [2021-05-02 20:23:07,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:07,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701844702] [2021-05-02 20:23:07,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:07,120 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:07,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518487495] [2021-05-02 20:23:07,120 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 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 20:23:07,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:23:07,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:07,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 20:23:07,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:07,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-05-02 20:23:07,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:07,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701844702] [2021-05-02 20:23:07,468 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:07,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518487495] [2021-05-02 20:23:07,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518487495] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:07,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:07,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:23:07,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218099460] [2021-05-02 20:23:07,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:23:07,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:07,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:23:07,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:23:07,470 INFO L87 Difference]: Start difference. First operand 148 states and 209 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:23:07,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:07,777 INFO L93 Difference]: Finished difference Result 154 states and 214 transitions. [2021-05-02 20:23:07,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:23:07,778 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2021-05-02 20:23:07,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:07,779 INFO L225 Difference]: With dead ends: 154 [2021-05-02 20:23:07,779 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 20:23:07,779 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:23:07,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 20:23:07,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2021-05-02 20:23:07,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 80 states have (on average 1.1875) internal successors, (95), 87 states have internal predecessors, (95), 60 states have call successors, (60), 12 states have call predecessors, (60), 11 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 20:23:07,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 212 transitions. [2021-05-02 20:23:07,784 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 212 transitions. Word has length 85 [2021-05-02 20:23:07,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:07,784 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 212 transitions. [2021-05-02 20:23:07,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:23:07,785 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 212 transitions. [2021-05-02 20:23:07,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 20:23:07,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:07,785 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:23:07,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:07,986 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:07,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:07,987 INFO L82 PathProgramCache]: Analyzing trace with hash 583225195, now seen corresponding path program 2 times [2021-05-02 20:23:07,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:07,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395058310] [2021-05-02 20:23:07,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:07,993 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:07,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099698031] [2021-05-02 20:23:07,994 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 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 20:23:08,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:23:08,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:08,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:23:08,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:08,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 27 proven. 35 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-05-02 20:23:08,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:08,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395058310] [2021-05-02 20:23:08,187 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:08,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099698031] [2021-05-02 20:23:08,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099698031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:08,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:08,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:23:08,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781163278] [2021-05-02 20:23:08,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:23:08,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:08,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:23:08,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:23:08,189 INFO L87 Difference]: Start difference. First operand 152 states and 212 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 20:23:08,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:08,394 INFO L93 Difference]: Finished difference Result 213 states and 317 transitions. [2021-05-02 20:23:08,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:23:08,395 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 89 [2021-05-02 20:23:08,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:08,396 INFO L225 Difference]: With dead ends: 213 [2021-05-02 20:23:08,396 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 20:23:08,396 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:23:08,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 20:23:08,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 186. [2021-05-02 20:23:08,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 100 states have internal predecessors, (113), 80 states have call successors, (80), 13 states have call predecessors, (80), 12 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2021-05-02 20:23:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 270 transitions. [2021-05-02 20:23:08,402 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 270 transitions. Word has length 89 [2021-05-02 20:23:08,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:08,403 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 270 transitions. [2021-05-02 20:23:08,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 20:23:08,403 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 270 transitions. [2021-05-02 20:23:08,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 20:23:08,403 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:08,403 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2021-05-02 20:23:08,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:23:08,610 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:08,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:08,610 INFO L82 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2021-05-02 20:23:08,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:08,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456855639] [2021-05-02 20:23:08,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:08,617 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:08,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396522362] [2021-05-02 20:23:08,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:23:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:23:08,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 20:23:08,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:08,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:08,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-05-02 20:23:09,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:09,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456855639] [2021-05-02 20:23:09,023 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:09,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396522362] [2021-05-02 20:23:09,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396522362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:09,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:09,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:23:09,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696185497] [2021-05-02 20:23:09,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:23:09,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:09,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:23:09,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:23:09,025 INFO L87 Difference]: Start difference. First operand 186 states and 270 transitions. Second operand has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 20:23:09,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:09,431 INFO L93 Difference]: Finished difference Result 219 states and 318 transitions. [2021-05-02 20:23:09,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:23:09,432 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 91 [2021-05-02 20:23:09,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:09,433 INFO L225 Difference]: With dead ends: 219 [2021-05-02 20:23:09,433 INFO L226 Difference]: Without dead ends: 218 [2021-05-02 20:23:09,433 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 256.8ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:23:09,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-02 20:23:09,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-05-02 20:23:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 117 states have internal predecessors, (132), 93 states have call successors, (93), 15 states have call predecessors, (93), 14 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2021-05-02 20:23:09,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 315 transitions. [2021-05-02 20:23:09,440 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 315 transitions. Word has length 91 [2021-05-02 20:23:09,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:09,440 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 315 transitions. [2021-05-02 20:23:09,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 20:23:09,440 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 315 transitions. [2021-05-02 20:23:09,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 20:23:09,441 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:09,441 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 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] [2021-05-02 20:23:09,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:23:09,657 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:09,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:09,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1735983139, now seen corresponding path program 4 times [2021-05-02 20:23:09,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:09,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89673456] [2021-05-02 20:23:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:09,664 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:09,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638664422] [2021-05-02 20:23:09,664 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 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 20:23:09,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:23:09,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:09,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:23:09,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:09,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:09,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:09,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:09,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:09,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:09,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:09,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:09,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:09,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:09,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:09,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:09,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-02 20:23:09,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:09,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89673456] [2021-05-02 20:23:09,819 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:09,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638664422] [2021-05-02 20:23:09,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638664422] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:23:09,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:23:09,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:23:09,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995155568] [2021-05-02 20:23:09,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:23:09,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:09,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:23:09,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:23:09,820 INFO L87 Difference]: Start difference. First operand 217 states and 315 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-05-02 20:23:09,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:09,868 INFO L93 Difference]: Finished difference Result 194 states and 271 transitions. [2021-05-02 20:23:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:23:09,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2021-05-02 20:23:09,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:09,869 INFO L225 Difference]: With dead ends: 194 [2021-05-02 20:23:09,869 INFO L226 Difference]: Without dead ends: 194 [2021-05-02 20:23:09,869 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:23:09,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-02 20:23:09,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 185. [2021-05-02 20:23:09,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 94 states have (on average 1.148936170212766) internal successors, (108), 101 states have internal predecessors, (108), 76 states have call successors, (76), 15 states have call predecessors, (76), 14 states have return successors, (73), 68 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 20:23:09,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 257 transitions. [2021-05-02 20:23:09,874 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 257 transitions. Word has length 100 [2021-05-02 20:23:09,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:09,878 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 257 transitions. [2021-05-02 20:23:09,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-05-02 20:23:09,878 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 257 transitions. [2021-05-02 20:23:09,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 20:23:09,878 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:09,879 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:23:10,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:23:10,089 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:10,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:10,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 1 times [2021-05-02 20:23:10,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:10,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273924146] [2021-05-02 20:23:10,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:10,095 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:10,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497309152] [2021-05-02 20:23:10,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:23:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:23:10,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 20:23:10,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:10,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 68 proven. 41 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-05-02 20:23:10,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:10,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273924146] [2021-05-02 20:23:10,561 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:10,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497309152] [2021-05-02 20:23:10,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497309152] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:10,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:10,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:23:10,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768169309] [2021-05-02 20:23:10,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:23:10,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:10,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:23:10,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:23:10,562 INFO L87 Difference]: Start difference. First operand 185 states and 257 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 20:23:17,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:17,025 INFO L93 Difference]: Finished difference Result 190 states and 261 transitions. [2021-05-02 20:23:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:23:17,026 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 107 [2021-05-02 20:23:17,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:17,027 INFO L225 Difference]: With dead ends: 190 [2021-05-02 20:23:17,027 INFO L226 Difference]: Without dead ends: 190 [2021-05-02 20:23:17,027 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 345.3ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:23:17,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-02 20:23:17,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 158. [2021-05-02 20:23:17,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 87 states have internal predecessors, (93), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (60), 56 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 20:23:17,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 216 transitions. [2021-05-02 20:23:17,031 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 216 transitions. Word has length 107 [2021-05-02 20:23:17,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:17,032 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 216 transitions. [2021-05-02 20:23:17,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 20:23:17,032 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 216 transitions. [2021-05-02 20:23:17,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-02 20:23:17,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:17,033 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 20:23:17,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:17,248 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:17,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:17,249 INFO L82 PathProgramCache]: Analyzing trace with hash 82449829, now seen corresponding path program 3 times [2021-05-02 20:23:17,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:17,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441881445] [2021-05-02 20:23:17,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:17,262 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:17,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589133825] [2021-05-02 20:23:17,262 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 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 20:23:17,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:23:17,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:17,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 20:23:17,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:17,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 87 proven. 11 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-05-02 20:23:17,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:17,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441881445] [2021-05-02 20:23:17,482 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:17,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589133825] [2021-05-02 20:23:17,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589133825] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:17,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:17,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:23:17,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224360016] [2021-05-02 20:23:17,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:23:17,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:17,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:23:17,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:23:17,483 INFO L87 Difference]: Start difference. First operand 158 states and 216 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-02 20:23:17,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:17,541 INFO L93 Difference]: Finished difference Result 162 states and 219 transitions. [2021-05-02 20:23:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:23:17,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-05-02 20:23:17,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:17,543 INFO L225 Difference]: With dead ends: 162 [2021-05-02 20:23:17,543 INFO L226 Difference]: Without dead ends: 162 [2021-05-02 20:23:17,543 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:23:17,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-02 20:23:17,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 138. [2021-05-02 20:23:17,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 79 states have internal predecessors, (83), 50 states have call successors, (50), 14 states have call predecessors, (50), 13 states have return successors, (47), 44 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-02 20:23:17,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 180 transitions. [2021-05-02 20:23:17,547 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 180 transitions. Word has length 111 [2021-05-02 20:23:17,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:17,547 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 180 transitions. [2021-05-02 20:23:17,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-02 20:23:17,547 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 180 transitions. [2021-05-02 20:23:17,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 20:23:17,548 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:17,548 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2021-05-02 20:23:17,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:23:17,765 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:17,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:17,765 INFO L82 PathProgramCache]: Analyzing trace with hash -966740615, now seen corresponding path program 2 times [2021-05-02 20:23:17,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:17,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120551645] [2021-05-02 20:23:17,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:17,770 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:17,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288710439] [2021-05-02 20:23:17,770 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 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 20:23:17,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:23:17,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:17,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 20:23:17,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:17,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:18,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:18,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:18,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:18,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:18,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:18,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:18,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:18,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:18,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:18,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:18,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:18,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:18,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:18,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:18,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 75 proven. 65 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-05-02 20:23:18,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:18,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120551645] [2021-05-02 20:23:18,311 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:18,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288710439] [2021-05-02 20:23:18,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288710439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:18,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:18,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:23:18,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041694384] [2021-05-02 20:23:18,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:23:18,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:18,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:23:18,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:23:18,314 INFO L87 Difference]: Start difference. First operand 138 states and 180 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 20:23:19,296 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-05-02 20:23:19,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:19,428 INFO L93 Difference]: Finished difference Result 172 states and 228 transitions. [2021-05-02 20:23:19,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:23:19,429 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) Word has length 113 [2021-05-02 20:23:19,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:19,430 INFO L225 Difference]: With dead ends: 172 [2021-05-02 20:23:19,430 INFO L226 Difference]: Without dead ends: 171 [2021-05-02 20:23:19,430 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 944.3ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-02 20:23:19,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-02 20:23:19,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2021-05-02 20:23:19,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 96 states have internal predecessors, (101), 63 states have call successors, (63), 16 states have call predecessors, (63), 15 states have return successors, (60), 56 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 20:23:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 224 transitions. [2021-05-02 20:23:19,434 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 224 transitions. Word has length 113 [2021-05-02 20:23:19,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:19,434 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 224 transitions. [2021-05-02 20:23:19,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 20:23:19,435 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 224 transitions. [2021-05-02 20:23:19,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 20:23:19,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:19,435 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:23:19,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:23:19,637 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:19,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:19,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1855467922, now seen corresponding path program 3 times [2021-05-02 20:23:19,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:19,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947773389] [2021-05-02 20:23:19,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:19,643 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:19,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633618916] [2021-05-02 20:23:19,643 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 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 20:23:19,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:23:19,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:19,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:23:19,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:19,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-05-02 20:23:19,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:19,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947773389] [2021-05-02 20:23:19,863 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:19,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633618916] [2021-05-02 20:23:19,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633618916] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:19,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:19,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:23:19,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612409435] [2021-05-02 20:23:19,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:23:19,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:19,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:23:19,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:23:19,866 INFO L87 Difference]: Start difference. First operand 169 states and 224 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-02 20:23:20,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:20,034 INFO L93 Difference]: Finished difference Result 207 states and 292 transitions. [2021-05-02 20:23:20,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:23:20,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2021-05-02 20:23:20,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:20,035 INFO L225 Difference]: With dead ends: 207 [2021-05-02 20:23:20,035 INFO L226 Difference]: Without dead ends: 207 [2021-05-02 20:23:20,035 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:23:20,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-02 20:23:20,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 188. [2021-05-02 20:23:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 99 states have internal predecessors, (112), 75 states have call successors, (75), 16 states have call predecessors, (75), 15 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 20:23:20,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 259 transitions. [2021-05-02 20:23:20,040 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 259 transitions. Word has length 116 [2021-05-02 20:23:20,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:20,040 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 259 transitions. [2021-05-02 20:23:20,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-02 20:23:20,041 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 259 transitions. [2021-05-02 20:23:20,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 20:23:20,042 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:20,042 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1] [2021-05-02 20:23:20,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:23:20,253 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:20,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:20,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1380247977, now seen corresponding path program 2 times [2021-05-02 20:23:20,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:20,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056060453] [2021-05-02 20:23:20,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:20,259 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:20,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346429109] [2021-05-02 20:23:20,260 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 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 20:23:20,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:23:20,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:20,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:23:20,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:20,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 49 proven. 62 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2021-05-02 20:23:20,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:20,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056060453] [2021-05-02 20:23:20,764 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:20,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346429109] [2021-05-02 20:23:20,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346429109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:20,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:20,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:23:20,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687071555] [2021-05-02 20:23:20,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:23:20,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:20,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:23:20,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:23:20,767 INFO L87 Difference]: Start difference. First operand 188 states and 259 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 20:23:22,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:22,698 INFO L93 Difference]: Finished difference Result 265 states and 378 transitions. [2021-05-02 20:23:22,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 20:23:22,699 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 122 [2021-05-02 20:23:22,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:22,700 INFO L225 Difference]: With dead ends: 265 [2021-05-02 20:23:22,700 INFO L226 Difference]: Without dead ends: 265 [2021-05-02 20:23:22,700 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1047.7ms TimeCoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 20:23:22,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-02 20:23:22,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 259. [2021-05-02 20:23:22,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 132 states have internal predecessors, (152), 111 states have call successors, (111), 18 states have call predecessors, (111), 17 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2021-05-02 20:23:22,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 371 transitions. [2021-05-02 20:23:22,707 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 371 transitions. Word has length 122 [2021-05-02 20:23:22,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:22,707 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 371 transitions. [2021-05-02 20:23:22,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 20:23:22,708 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 371 transitions. [2021-05-02 20:23:22,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-02 20:23:22,709 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:22,709 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1] [2021-05-02 20:23:22,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:22,925 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:22,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:22,925 INFO L82 PathProgramCache]: Analyzing trace with hash 259955901, now seen corresponding path program 3 times [2021-05-02 20:23:22,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:22,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515425971] [2021-05-02 20:23:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:22,932 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:22,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447969782] [2021-05-02 20:23:22,932 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:22,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:23:22,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:22,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 20:23:22,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:22,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:22,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:23,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:23,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:23,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 78 proven. 41 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-05-02 20:23:23,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:23,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515425971] [2021-05-02 20:23:23,271 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:23,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447969782] [2021-05-02 20:23:23,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447969782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:23,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:23,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:23:23,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519972481] [2021-05-02 20:23:23,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:23:23,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:23,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:23:23,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:23:23,273 INFO L87 Difference]: Start difference. First operand 259 states and 371 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 20:23:23,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:23,775 INFO L93 Difference]: Finished difference Result 299 states and 421 transitions. [2021-05-02 20:23:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:23:23,775 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2021-05-02 20:23:23,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:23,777 INFO L225 Difference]: With dead ends: 299 [2021-05-02 20:23:23,777 INFO L226 Difference]: Without dead ends: 299 [2021-05-02 20:23:23,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 199.6ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:23:23,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-05-02 20:23:23,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 296. [2021-05-02 20:23:23,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 151 states have (on average 1.1589403973509933) internal successors, (175), 153 states have internal predecessors, (175), 123 states have call successors, (123), 22 states have call predecessors, (123), 21 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 20:23:23,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 418 transitions. [2021-05-02 20:23:23,784 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 418 transitions. Word has length 127 [2021-05-02 20:23:23,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:23,784 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 418 transitions. [2021-05-02 20:23:23,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 20:23:23,784 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 418 transitions. [2021-05-02 20:23:23,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 20:23:23,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:23,785 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-05-02 20:23:23,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:23,999 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:24,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:24,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1431100670, now seen corresponding path program 4 times [2021-05-02 20:23:24,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:24,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068911576] [2021-05-02 20:23:24,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:24,005 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:24,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037994155] [2021-05-02 20:23:24,005 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:24,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:23:24,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:24,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 20:23:24,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:24,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 119 proven. 93 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-05-02 20:23:24,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:24,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068911576] [2021-05-02 20:23:24,564 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:24,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037994155] [2021-05-02 20:23:24,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037994155] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:24,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:24,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:23:24,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321007565] [2021-05-02 20:23:24,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:23:24,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:24,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:23:24,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:23:24,565 INFO L87 Difference]: Start difference. First operand 296 states and 418 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-05-02 20:23:29,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:29,066 INFO L93 Difference]: Finished difference Result 314 states and 432 transitions. [2021-05-02 20:23:29,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:23:29,067 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2021-05-02 20:23:29,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:29,068 INFO L225 Difference]: With dead ends: 314 [2021-05-02 20:23:29,068 INFO L226 Difference]: Without dead ends: 314 [2021-05-02 20:23:29,068 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 349.2ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:23:29,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-02 20:23:29,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2021-05-02 20:23:29,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 163 states have (on average 1.147239263803681) internal successors, (187), 165 states have internal predecessors, (187), 123 states have call successors, (123), 26 states have call predecessors, (123), 25 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 20:23:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 430 transitions. [2021-05-02 20:23:29,075 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 430 transitions. Word has length 129 [2021-05-02 20:23:29,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:29,075 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 430 transitions. [2021-05-02 20:23:29,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-05-02 20:23:29,075 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 430 transitions. [2021-05-02 20:23:29,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 20:23:29,076 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:29,076 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 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, 1] [2021-05-02 20:23:29,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 20:23:29,277 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:29,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:29,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1491357193, now seen corresponding path program 5 times [2021-05-02 20:23:29,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:29,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583381369] [2021-05-02 20:23:29,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:29,283 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:29,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391649510] [2021-05-02 20:23:29,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:40,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 20:23:40,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:40,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-02 20:23:40,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:40,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 91 proven. 81 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-05-02 20:23:40,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:40,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583381369] [2021-05-02 20:23:40,955 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:40,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391649510] [2021-05-02 20:23:40,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391649510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:40,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:40,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 20:23:40,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081454544] [2021-05-02 20:23:40,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 20:23:40,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:40,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 20:23:40,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:23:40,956 INFO L87 Difference]: Start difference. First operand 312 states and 430 transitions. Second operand has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) [2021-05-02 20:23:43,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:43,995 INFO L93 Difference]: Finished difference Result 333 states and 447 transitions. [2021-05-02 20:23:43,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 20:23:43,995 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) Word has length 132 [2021-05-02 20:23:43,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:43,997 INFO L225 Difference]: With dead ends: 333 [2021-05-02 20:23:43,997 INFO L226 Difference]: Without dead ends: 333 [2021-05-02 20:23:43,997 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 881.1ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-05-02 20:23:43,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-05-02 20:23:44,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 328. [2021-05-02 20:23:44,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 175 states have (on average 1.1371428571428572) internal successors, (199), 177 states have internal predecessors, (199), 123 states have call successors, (123), 30 states have call predecessors, (123), 29 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 20:23:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 442 transitions. [2021-05-02 20:23:44,004 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 442 transitions. Word has length 132 [2021-05-02 20:23:44,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:44,004 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 442 transitions. [2021-05-02 20:23:44,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) [2021-05-02 20:23:44,004 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 442 transitions. [2021-05-02 20:23:44,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 20:23:44,005 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:44,005 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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 20:23:44,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 20:23:44,215 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:44,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:44,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1694952883, now seen corresponding path program 4 times [2021-05-02 20:23:44,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:44,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614119390] [2021-05-02 20:23:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:44,221 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:44,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930809396] [2021-05-02 20:23:44,221 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:44,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:23:44,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:44,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-02 20:23:44,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:44,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 84 proven. 85 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-05-02 20:23:44,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:44,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614119390] [2021-05-02 20:23:44,762 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:44,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930809396] [2021-05-02 20:23:44,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930809396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:44,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:44,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:23:44,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988442477] [2021-05-02 20:23:44,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:23:44,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:44,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:23:44,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:23:44,763 INFO L87 Difference]: Start difference. First operand 328 states and 442 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 20:23:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:45,429 INFO L93 Difference]: Finished difference Result 362 states and 495 transitions. [2021-05-02 20:23:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:23:45,429 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) Word has length 135 [2021-05-02 20:23:45,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:45,430 INFO L225 Difference]: With dead ends: 362 [2021-05-02 20:23:45,431 INFO L226 Difference]: Without dead ends: 361 [2021-05-02 20:23:45,431 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 373.9ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-02 20:23:45,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-05-02 20:23:45,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 359. [2021-05-02 20:23:45,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 189 states have (on average 1.1428571428571428) internal successors, (216), 191 states have internal predecessors, (216), 139 states have call successors, (139), 31 states have call predecessors, (139), 30 states have return successors, (136), 136 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-02 20:23:45,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 491 transitions. [2021-05-02 20:23:45,438 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 491 transitions. Word has length 135 [2021-05-02 20:23:45,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:45,438 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 491 transitions. [2021-05-02 20:23:45,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 20:23:45,438 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 491 transitions. [2021-05-02 20:23:45,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 20:23:45,439 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:45,439 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:23:45,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:45,653 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:45,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:45,653 INFO L82 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 5 times [2021-05-02 20:23:45,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:45,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112332866] [2021-05-02 20:23:45,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:45,658 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:45,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878684941] [2021-05-02 20:23:45,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:45,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 20:23:45,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:45,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-02 20:23:45,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:45,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:45,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 102 proven. 153 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-05-02 20:23:46,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:46,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112332866] [2021-05-02 20:23:46,689 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:46,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878684941] [2021-05-02 20:23:46,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878684941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:46,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:46,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 20:23:46,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972949385] [2021-05-02 20:23:46,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 20:23:46,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:46,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 20:23:46,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-02 20:23:46,690 INFO L87 Difference]: Start difference. First operand 359 states and 491 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 20:23:49,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:49,627 INFO L93 Difference]: Finished difference Result 411 states and 559 transitions. [2021-05-02 20:23:49,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 20:23:49,628 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) Word has length 138 [2021-05-02 20:23:49,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:49,629 INFO L225 Difference]: With dead ends: 411 [2021-05-02 20:23:49,629 INFO L226 Difference]: Without dead ends: 411 [2021-05-02 20:23:49,629 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 814.3ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-05-02 20:23:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-05-02 20:23:49,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 407. [2021-05-02 20:23:49,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 215 states have (on average 1.1441860465116278) internal successors, (246), 218 states have internal predecessors, (246), 156 states have call successors, (156), 36 states have call predecessors, (156), 35 states have return successors, (153), 152 states have call predecessors, (153), 153 states have call successors, (153) [2021-05-02 20:23:49,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 555 transitions. [2021-05-02 20:23:49,638 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 555 transitions. Word has length 138 [2021-05-02 20:23:49,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:49,638 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 555 transitions. [2021-05-02 20:23:49,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 20:23:49,638 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 555 transitions. [2021-05-02 20:23:49,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 20:23:49,639 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:49,639 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:23:49,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 20:23:49,853 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:49,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:49,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1199073726, now seen corresponding path program 1 times [2021-05-02 20:23:49,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:49,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152025784] [2021-05-02 20:23:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:49,863 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:49,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097394929] [2021-05-02 20:23:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:23:49,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 20:23:49,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:49,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:49,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:49,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:49,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:49,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:49,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 59 proven. 123 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-05-02 20:23:50,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:50,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152025784] [2021-05-02 20:23:50,440 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:50,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097394929] [2021-05-02 20:23:50,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097394929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:50,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:50,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 20:23:50,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146713551] [2021-05-02 20:23:50,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 20:23:50,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:50,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 20:23:50,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:23:50,441 INFO L87 Difference]: Start difference. First operand 407 states and 555 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2021-05-02 20:23:51,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:51,230 INFO L93 Difference]: Finished difference Result 419 states and 565 transitions. [2021-05-02 20:23:51,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 20:23:51,230 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 143 [2021-05-02 20:23:51,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:51,232 INFO L225 Difference]: With dead ends: 419 [2021-05-02 20:23:51,232 INFO L226 Difference]: Without dead ends: 417 [2021-05-02 20:23:51,232 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 498.0ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-05-02 20:23:51,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-05-02 20:23:51,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 414. [2021-05-02 20:23:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 221 states have (on average 1.1357466063348416) internal successors, (251), 223 states have internal predecessors, (251), 155 states have call successors, (155), 38 states have call predecessors, (155), 37 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2021-05-02 20:23:51,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 558 transitions. [2021-05-02 20:23:51,240 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 558 transitions. Word has length 143 [2021-05-02 20:23:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:51,240 INFO L480 AbstractCegarLoop]: Abstraction has 414 states and 558 transitions. [2021-05-02 20:23:51,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2021-05-02 20:23:51,240 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 558 transitions. [2021-05-02 20:23:51,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-02 20:23:51,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:51,241 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 6, 6, 5, 5, 5, 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] [2021-05-02 20:23:51,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:51,456 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:51,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:51,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1825079459, now seen corresponding path program 6 times [2021-05-02 20:23:51,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:51,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319841826] [2021-05-02 20:23:51,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:51,461 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:51,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728683760] [2021-05-02 20:23:51,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:24:15,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 20:24:15,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:24:15,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 78 conjunts are in the unsatisfiable core [2021-05-02 20:24:15,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:24:15,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:15,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:18,247 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 20:24:55,701 WARN L205 SmtUtils]: Spent 25.02 s on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 20:25:13,541 WARN L205 SmtUtils]: Spent 10.12 s on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 20:25:13,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:13,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:15,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:15,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:15,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:15,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:15,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:15,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:15,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:15,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:15,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:15,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:15,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:15,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:15,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:15,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:15,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:15,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:15,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:15,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:15,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,657 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_BEFORE_CALL_260 Int) (v_main_~y~0_BEFORE_CALL_214 Int) (v_main_~a~0_BEFORE_CALL_111 Int) (v_main_~r~0_BEFORE_CALL_161 Int)) (let ((.cse0 (* v_main_~x~0_BEFORE_CALL_260 v_main_~y~0_BEFORE_CALL_214))) (and (= (+ .cse0 v_main_~a~0_BEFORE_CALL_111 (* v_main_~y~0_BEFORE_CALL_214 v_main_~y~0_BEFORE_CALL_214 v_main_~r~0_BEFORE_CALL_161)) (+ (* v_main_~y~0_BEFORE_CALL_214 v_main_~r~0_BEFORE_CALL_161) v_main_~x~0_BEFORE_CALL_260 (* v_main_~y~0_BEFORE_CALL_214 v_main_~a~0_BEFORE_CALL_111))) (<= v_main_~x~0_BEFORE_CALL_260 100) (< .cse0 2147483647) (< v_main_~a~0_BEFORE_CALL_111 v_main_~y~0_BEFORE_CALL_214) (< v_main_~y~0_BEFORE_CALL_214 (* 2 v_main_~a~0_BEFORE_CALL_111)) (<= 0 v_main_~x~0_BEFORE_CALL_260)))) is different from true [2021-05-02 20:25:19,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:19,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:21,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:21,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:21,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:21,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:21,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:21,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:21,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:21,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:21,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:21,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:21,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:21,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:21,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:21,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:21,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:21,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:21,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:21,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:21,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:21,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:23,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:23,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:23,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:23,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:23,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:23,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:23,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:23,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:23,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:23,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:23,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:23,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:23,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:23,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:23,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:23,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:23,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:23,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:23,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:23,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:43,450 WARN L205 SmtUtils]: Spent 10.91 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:25:43,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:43,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:45,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:47,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:06,455 WARN L205 SmtUtils]: Spent 10.33 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:26:06,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:06,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:08,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:08,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:08,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:08,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:08,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:08,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:08,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:08,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:08,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:08,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:08,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:08,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:08,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:08,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:08,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:08,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:08,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:08,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:08,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:10,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:10,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:10,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:10,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:10,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:10,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:10,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:10,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:10,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:10,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:10,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:10,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:10,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:10,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:10,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:10,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:10,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:10,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:10,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:10,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:26:12,590 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_112 Int) (v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int)) (let ((.cse1 (* v_main_~x~0_BEFORE_CALL_261 v_main_~y~0_BEFORE_CALL_215)) (.cse0 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215))) (and (<= v_main_~x~0_BEFORE_CALL_261 100) (not (= v_main_~a~0_BEFORE_CALL_112 (+ v_main_~x~0_BEFORE_CALL_261 .cse0))) (< v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215) (< .cse1 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (= (+ v_main_~a~0_BEFORE_CALL_112 .cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215)) (+ v_main_~x~0_BEFORE_CALL_261 .cse0 (* v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215))) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_112))))) is different from false [2021-05-02 20:26:14,606 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_112 Int) (v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int)) (let ((.cse1 (* v_main_~x~0_BEFORE_CALL_261 v_main_~y~0_BEFORE_CALL_215)) (.cse0 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215))) (and (<= v_main_~x~0_BEFORE_CALL_261 100) (not (= v_main_~a~0_BEFORE_CALL_112 (+ v_main_~x~0_BEFORE_CALL_261 .cse0))) (< v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215) (< .cse1 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (= (+ v_main_~a~0_BEFORE_CALL_112 .cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215)) (+ v_main_~x~0_BEFORE_CALL_261 .cse0 (* v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215))) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_112))))) is different from true [2021-05-02 20:26:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 125 proven. 84 refuted. 3 times theorem prover too weak. 480 trivial. 1 not checked. [2021-05-02 20:26:14,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:26:14,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319841826] [2021-05-02 20:26:14,607 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:26:14,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728683760] [2021-05-02 20:26:14,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728683760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:26:14,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:26:14,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 20:26:14,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124017127] [2021-05-02 20:26:14,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 20:26:14,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:26:14,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 20:26:14,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=275, Unknown=20, NotChecked=70, Total=420 [2021-05-02 20:26:14,609 INFO L87 Difference]: Start difference. First operand 414 states and 558 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 8 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 20:26:27,230 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 34 DAG size of output: 3 [2021-05-02 20:26:37,560 WARN L205 SmtUtils]: Spent 10.20 s on a formula simplification. DAG size of input: 40 DAG size of output: 6 [2021-05-02 20:26:56,163 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-02 20:27:16,622 WARN L205 SmtUtils]: Spent 18.57 s on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-05-02 20:28:41,387 WARN L205 SmtUtils]: Spent 59.26 s on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-05-02 20:29:19,334 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (exists ((v_main_~a~0_BEFORE_CALL_112 Int) (v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int)) (let ((.cse2 (* v_main_~x~0_BEFORE_CALL_261 v_main_~y~0_BEFORE_CALL_215)) (.cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215))) (and (<= v_main_~x~0_BEFORE_CALL_261 100) (not (= v_main_~a~0_BEFORE_CALL_112 (+ v_main_~x~0_BEFORE_CALL_261 .cse1))) (< v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215) (< .cse2 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (= (+ v_main_~a~0_BEFORE_CALL_112 .cse2 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215)) (+ v_main_~x~0_BEFORE_CALL_261 .cse1 (* v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215))) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_112))))))) (and .cse0 (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond) (or (= c___VERIFIER_assert_~cond 1) (and (= c___VERIFIER_assert_~cond 0) .cse0)) (or (= |c___VERIFIER_assert_#in~cond| 1) (and (= |c___VERIFIER_assert_#in~cond| 0) .cse0)))) is different from false [2021-05-02 20:29:21,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:29:21,376 INFO L93 Difference]: Finished difference Result 460 states and 614 transitions. [2021-05-02 20:29:21,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 20:29:21,377 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 8 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 144 [2021-05-02 20:29:21,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:29:21,379 INFO L225 Difference]: With dead ends: 460 [2021-05-02 20:29:21,379 INFO L226 Difference]: Without dead ends: 459 [2021-05-02 20:29:21,380 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 214048.8ms TimeCoverageRelationStatistics Valid=104, Invalid=581, Unknown=29, NotChecked=156, Total=870 [2021-05-02 20:29:21,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-05-02 20:29:21,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 451. [2021-05-02 20:29:21,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 242 states have (on average 1.1322314049586777) internal successors, (274), 244 states have internal predecessors, (274), 167 states have call successors, (167), 42 states have call predecessors, (167), 41 states have return successors, (164), 164 states have call predecessors, (164), 164 states have call successors, (164) [2021-05-02 20:29:21,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 605 transitions. [2021-05-02 20:29:21,388 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 605 transitions. Word has length 144 [2021-05-02 20:29:21,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:29:21,388 INFO L480 AbstractCegarLoop]: Abstraction has 451 states and 605 transitions. [2021-05-02 20:29:21,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 8 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 20:29:21,388 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 605 transitions. [2021-05-02 20:29:21,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-02 20:29:21,389 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:29:21,389 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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] [2021-05-02 20:29:21,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 20:29:21,603 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:29:21,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:29:21,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1855514487, now seen corresponding path program 7 times [2021-05-02 20:29:21,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:29:21,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33429535] [2021-05-02 20:29:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:29:21,609 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:29:21,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982648305] [2021-05-02 20:29:21,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:29:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:29:21,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 99 conjunts are in the unsatisfiable core [2021-05-02 20:29:21,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:29:21,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:21,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:21,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:21,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:21,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:21,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:21,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:21,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:21,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:21,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:21,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:21,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:21,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:21,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:21,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:21,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:21,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:21,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:22,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:24,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:24,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:24,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:24,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:24,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:24,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:24,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:24,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:24,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 129 proven. 197 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-05-02 20:29:25,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:29:25,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33429535] [2021-05-02 20:29:25,043 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:29:25,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982648305] [2021-05-02 20:29:25,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982648305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:29:25,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:29:25,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 20:29:25,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786827769] [2021-05-02 20:29:25,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 20:29:25,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:29:25,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 20:29:25,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-02 20:29:25,044 INFO L87 Difference]: Start difference. First operand 451 states and 605 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2021-05-02 20:29:26,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:29:26,271 INFO L93 Difference]: Finished difference Result 491 states and 655 transitions. [2021-05-02 20:29:26,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 20:29:26,272 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) Word has length 149 [2021-05-02 20:29:26,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:29:26,273 INFO L225 Difference]: With dead ends: 491 [2021-05-02 20:29:26,273 INFO L226 Difference]: Without dead ends: 491 [2021-05-02 20:29:26,274 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 878.8ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-05-02 20:29:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-05-02 20:29:26,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 488. [2021-05-02 20:29:26,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 263 states have (on average 1.129277566539924) internal successors, (297), 265 states have internal predecessors, (297), 179 states have call successors, (179), 46 states have call predecessors, (179), 45 states have return successors, (176), 176 states have call predecessors, (176), 176 states have call successors, (176) [2021-05-02 20:29:26,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 652 transitions. [2021-05-02 20:29:26,282 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 652 transitions. Word has length 149 [2021-05-02 20:29:26,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:29:26,282 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 652 transitions. [2021-05-02 20:29:26,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2021-05-02 20:29:26,282 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 652 transitions. [2021-05-02 20:29:26,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-02 20:29:26,283 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:29:26,283 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:29:26,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:29:26,497 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:29:26,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:29:26,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1402624196, now seen corresponding path program 8 times [2021-05-02 20:29:26,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:29:26,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288446084] [2021-05-02 20:29:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:29:26,501 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:29:26,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010577076] [2021-05-02 20:29:26,501 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:29:26,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:29:26,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:29:26,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 97 conjunts are in the unsatisfiable core [2021-05-02 20:29:26,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:29:26,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:26,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 137 proven. 208 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-05-02 20:29:27,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:29:27,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288446084] [2021-05-02 20:29:27,618 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:29:27,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010577076] [2021-05-02 20:29:27,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010577076] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:29:27,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:29:27,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:29:27,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165512556] [2021-05-02 20:29:27,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:29:27,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:29:27,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:29:27,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:29:27,619 INFO L87 Difference]: Start difference. First operand 488 states and 652 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2021-05-02 20:29:34,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:29:34,738 INFO L93 Difference]: Finished difference Result 498 states and 660 transitions. [2021-05-02 20:29:34,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:29:34,739 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) Word has length 151 [2021-05-02 20:29:34,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:29:34,741 INFO L225 Difference]: With dead ends: 498 [2021-05-02 20:29:34,741 INFO L226 Difference]: Without dead ends: 498 [2021-05-02 20:29:34,741 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 841.6ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-05-02 20:29:34,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-05-02 20:29:34,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2021-05-02 20:29:34,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 269 states have (on average 1.1263940520446096) internal successors, (303), 271 states have internal predecessors, (303), 179 states have call successors, (179), 48 states have call predecessors, (179), 47 states have return successors, (176), 176 states have call predecessors, (176), 176 states have call successors, (176) [2021-05-02 20:29:34,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 658 transitions. [2021-05-02 20:29:34,766 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 658 transitions. Word has length 151 [2021-05-02 20:29:34,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:29:34,766 INFO L480 AbstractCegarLoop]: Abstraction has 496 states and 658 transitions. [2021-05-02 20:29:34,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2021-05-02 20:29:34,767 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 658 transitions. [2021-05-02 20:29:34,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 20:29:34,768 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:29:34,768 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-02 20:29:34,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 20:29:34,981 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:29:34,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:29:34,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1866948721, now seen corresponding path program 9 times [2021-05-02 20:29:34,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:29:34,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837039553] [2021-05-02 20:29:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:29:34,986 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:29:34,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957977711] [2021-05-02 20:29:34,986 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:29:35,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:29:35,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:29:35,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 20:29:35,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:29:35,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:35,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 91 proven. 58 refuted. 0 times theorem prover too weak. 696 trivial. 0 not checked. [2021-05-02 20:29:35,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:29:35,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837039553] [2021-05-02 20:29:35,762 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:29:35,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957977711] [2021-05-02 20:29:35,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957977711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:29:35,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:29:35,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:29:35,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347258098] [2021-05-02 20:29:35,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:29:35,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:29:35,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:29:35,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:29:35,763 INFO L87 Difference]: Start difference. First operand 496 states and 658 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-05-02 20:29:40,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:29:40,374 INFO L93 Difference]: Finished difference Result 537 states and 711 transitions. [2021-05-02 20:29:40,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:29:40,375 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 154 [2021-05-02 20:29:40,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:29:40,386 INFO L225 Difference]: With dead ends: 537 [2021-05-02 20:29:40,386 INFO L226 Difference]: Without dead ends: 537 [2021-05-02 20:29:40,386 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 388.5ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:29:40,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-05-02 20:29:40,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 533. [2021-05-02 20:29:40,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 290 states have (on average 1.1275862068965516) internal successors, (327), 292 states have internal predecessors, (327), 191 states have call successors, (191), 52 states have call predecessors, (191), 51 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2021-05-02 20:29:40,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 706 transitions. [2021-05-02 20:29:40,417 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 706 transitions. Word has length 154 [2021-05-02 20:29:40,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:29:40,417 INFO L480 AbstractCegarLoop]: Abstraction has 533 states and 706 transitions. [2021-05-02 20:29:40,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-05-02 20:29:40,417 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 706 transitions. [2021-05-02 20:29:40,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 20:29:40,418 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:29:40,418 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-02 20:29:40,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:29:40,629 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:29:40,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:29:40,629 INFO L82 PathProgramCache]: Analyzing trace with hash 742722429, now seen corresponding path program 10 times [2021-05-02 20:29:40,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:29:40,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679398045] [2021-05-02 20:29:40,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:29:40,634 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:29:40,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894809804] [2021-05-02 20:29:40,634 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:29:40,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:29:40,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:29:40,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 119 conjunts are in the unsatisfiable core [2021-05-02 20:29:40,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:29:40,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:40,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:40,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:40,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:40,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:40,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:40,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:40,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:40,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:40,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:40,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:40,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:40,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:40,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:41,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:42,012 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-05-02 20:29:42,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:42,200 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-02 20:29:42,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:42,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:29:52,689 WARN L205 SmtUtils]: Spent 8.25 s on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 20:30:16,517 WARN L205 SmtUtils]: Spent 13.24 s on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-05-02 20:30:17,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:17,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:17,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:17,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:17,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:17,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:17,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:17,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 198 proven. 182 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-05-02 20:30:20,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:30:20,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679398045] [2021-05-02 20:30:20,441 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:30:20,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894809804] [2021-05-02 20:30:20,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894809804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:30:20,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:30:20,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-02 20:30:20,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718940721] [2021-05-02 20:30:20,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 20:30:20,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:30:20,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 20:30:20,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=431, Unknown=5, NotChecked=0, Total=506 [2021-05-02 20:30:20,442 INFO L87 Difference]: Start difference. First operand 533 states and 706 transitions. Second operand has 23 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 12 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2021-05-02 20:30:28,629 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-05-02 20:30:36,854 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_main_~y~0 c_main_~s~0)) (.cse3 (* c_main_~x~0 c_main_~q~0))) (let ((.cse7 (+ .cse2 .cse3)) (.cse1 (+ (* c_main_~y~0 c_main_~r~0) (* c_main_~x~0 c_main_~p~0))) (.cse4 (* c_main_~xy~0 c_main_~q~0)) (.cse5 (* c_main_~yy~0 c_main_~s~0)) (.cse0 (+ c_main_~b~0 c_main_~c~0)) (.cse11 (+ .cse2 .cse3 c_main_~c~0))) (and (= (* c_main_~y~0 c_main_~y~0) c_main_~yy~0) (= c_main_~p~0 0) (<= 1 c_main_~x~0) (= c_main_~r~0 1) (= .cse0 .cse1) (= c_main_~q~0 1) (= (+ .cse2 (* c_main_~y~0 c_main_~b~0) .cse3) (+ .cse4 c_main_~b~0 .cse5)) (or (= .cse0 0) (let ((.cse6 (div .cse0 .cse0))) (and (= (+ (* .cse6 c_main_~r~0) c_main_~s~0) 0) (< (+ .cse2 .cse3 (* c_main_~y~0 .cse6 c_main_~r~0)) (+ (* .cse6 c_main_~c~0) c_main_~b~0 (* .cse6 c_main_~b~0) c_main_~c~0))))) (= c_main_~y~0 .cse0) (< c_main_~c~0 .cse7) (= (* c_main_~x~0 c_main_~y~0) c_main_~xy~0) (or (let ((.cse8 (div c_main_~a~0 c_main_~a~0))) (let ((.cse10 (+ .cse2 .cse3 (* .cse8 c_main_~y~0 c_main_~r~0))) (.cse9 (* .cse8 c_main_~a~0))) (and (= (+ (* .cse8 c_main_~r~0) c_main_~s~0) 0) (= (+ c_main_~b~0 .cse9) .cse10) (< .cse10 (+ c_main_~a~0 .cse9))))) (= c_main_~a~0 0)) (= c_main_~b~0 .cse7) (= .cse11 .cse1) (= (+ .cse4 .cse5) (+ (* c_main_~x~0 c_main_~y~0 c_main_~q~0) (* c_main_~y~0 c_main_~y~0 c_main_~s~0))) (= c_main_~k~0 1) (= c_main_~a~0 .cse0) (= c_main_~a~0 c_main_~y~0) (or (= .cse11 0) (let ((.cse12 (let ((.cse13 (+ c_main_~c~0 .cse2 .cse3))) (div .cse13 .cse13)))) (and (= (+ (* .cse12 c_main_~r~0) c_main_~s~0) 0) (< (* .cse12 c_main_~y~0 c_main_~r~0) (+ (* .cse12 c_main_~c~0) c_main_~c~0 (* .cse12 c_main_~x~0 c_main_~q~0) (* .cse12 c_main_~y~0 c_main_~s~0)))))) (= .cse11 c_main_~y~0)))) is different from false [2021-05-02 20:30:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:30:43,671 INFO L93 Difference]: Finished difference Result 569 states and 756 transitions. [2021-05-02 20:30:43,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 20:30:43,673 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 12 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) Word has length 154 [2021-05-02 20:30:43,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:30:43,675 INFO L225 Difference]: With dead ends: 569 [2021-05-02 20:30:43,675 INFO L226 Difference]: Without dead ends: 569 [2021-05-02 20:30:43,676 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 43544.9ms TimeCoverageRelationStatistics Valid=102, Invalid=651, Unknown=7, NotChecked=52, Total=812 [2021-05-02 20:30:43,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-05-02 20:30:43,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 541. [2021-05-02 20:30:43,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 296 states have (on average 1.125) internal successors, (333), 298 states have internal predecessors, (333), 191 states have call successors, (191), 54 states have call predecessors, (191), 53 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2021-05-02 20:30:43,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 712 transitions. [2021-05-02 20:30:43,686 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 712 transitions. Word has length 154 [2021-05-02 20:30:43,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:30:43,686 INFO L480 AbstractCegarLoop]: Abstraction has 541 states and 712 transitions. [2021-05-02 20:30:43,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 12 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2021-05-02 20:30:43,686 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 712 transitions. [2021-05-02 20:30:43,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-02 20:30:43,687 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:30:43,687 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-02 20:30:43,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-02 20:30:43,903 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:30:43,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:30:43,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1947214227, now seen corresponding path program 6 times [2021-05-02 20:30:43,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:30:43,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141301259] [2021-05-02 20:30:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:30:43,908 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:30:43,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436535115] [2021-05-02 20:30:43,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:30:43,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 20:30:43,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:30:43,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 20:30:43,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:30:43,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:43,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 96 proven. 34 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2021-05-02 20:30:44,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:30:44,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141301259] [2021-05-02 20:30:44,590 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:30:44,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436535115] [2021-05-02 20:30:44,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436535115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:30:44,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:30:44,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:30:44,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950056547] [2021-05-02 20:30:44,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:30:44,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:30:44,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:30:44,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:30:44,591 INFO L87 Difference]: Start difference. First operand 541 states and 712 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 20:30:49,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:30:49,201 INFO L93 Difference]: Finished difference Result 546 states and 716 transitions. [2021-05-02 20:30:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:30:49,202 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 157 [2021-05-02 20:30:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:30:49,204 INFO L225 Difference]: With dead ends: 546 [2021-05-02 20:30:49,204 INFO L226 Difference]: Without dead ends: 545 [2021-05-02 20:30:49,204 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 385.3ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:30:49,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-05-02 20:30:49,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 544. [2021-05-02 20:30:49,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 299 states have (on average 1.120401337792642) internal successors, (335), 300 states have internal predecessors, (335), 190 states have call successors, (190), 55 states have call predecessors, (190), 54 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2021-05-02 20:30:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 713 transitions. [2021-05-02 20:30:49,213 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 713 transitions. Word has length 157 [2021-05-02 20:30:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:30:49,213 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 713 transitions. [2021-05-02 20:30:49,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 20:30:49,213 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 713 transitions. [2021-05-02 20:30:49,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-02 20:30:49,214 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:30:49,214 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-02 20:30:49,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:30:49,433 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:30:49,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:30:49,433 INFO L82 PathProgramCache]: Analyzing trace with hash 915217378, now seen corresponding path program 7 times [2021-05-02 20:30:49,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:30:49,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043433514] [2021-05-02 20:30:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:30:49,441 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:30:49,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350366495] [2021-05-02 20:30:49,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:30:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:30:49,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 86 conjunts are in the unsatisfiable core [2021-05-02 20:30:49,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:30:49,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:49,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 142 proven. 133 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-05-02 20:30:50,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:30:50,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043433514] [2021-05-02 20:30:50,855 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:30:50,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350366495] [2021-05-02 20:30:50,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350366495] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:30:50,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:30:50,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 20:30:50,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839316266] [2021-05-02 20:30:50,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 20:30:50,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:30:50,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 20:30:50,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:30:50,857 INFO L87 Difference]: Start difference. First operand 544 states and 713 transitions. Second operand has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 12 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 11 states have call successors, (27) [2021-05-02 20:30:52,129 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-05-02 20:30:52,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:30:52,568 INFO L93 Difference]: Finished difference Result 591 states and 777 transitions. [2021-05-02 20:30:52,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 20:30:52,569 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 12 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 11 states have call successors, (27) Word has length 160 [2021-05-02 20:30:52,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:30:52,571 INFO L225 Difference]: With dead ends: 591 [2021-05-02 20:30:52,571 INFO L226 Difference]: Without dead ends: 591 [2021-05-02 20:30:52,571 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1161.5ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-05-02 20:30:52,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-05-02 20:30:52,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 588. [2021-05-02 20:30:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 322 states have (on average 1.124223602484472) internal successors, (362), 324 states have internal predecessors, (362), 207 states have call successors, (207), 59 states have call predecessors, (207), 58 states have return successors, (205), 204 states have call predecessors, (205), 205 states have call successors, (205) [2021-05-02 20:30:52,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 774 transitions. [2021-05-02 20:30:52,580 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 774 transitions. Word has length 160 [2021-05-02 20:30:52,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:30:52,581 INFO L480 AbstractCegarLoop]: Abstraction has 588 states and 774 transitions. [2021-05-02 20:30:52,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 12 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 11 states have call successors, (27) [2021-05-02 20:30:52,581 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 774 transitions. [2021-05-02 20:30:52,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-02 20:30:52,582 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:30:52,582 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-02 20:30:52,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 20:30:52,797 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:30:52,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:30:52,797 INFO L82 PathProgramCache]: Analyzing trace with hash -970371602, now seen corresponding path program 8 times [2021-05-02 20:30:52,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:30:52,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780413313] [2021-05-02 20:30:52,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:30:52,802 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:30:52,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253557601] [2021-05-02 20:30:52,802 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:30:52,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:30:52,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:30:52,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 97 conjunts are in the unsatisfiable core [2021-05-02 20:30:52,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:30:52,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:52,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:52,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:52,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:52,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:52,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:53,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:54,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:54,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:54,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:54,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:56,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:56,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:56,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:58,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:30:58,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:31:00,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:31:00,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:31:13,944 WARN L205 SmtUtils]: Spent 10.22 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 20:31:13,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:31:13,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:31:15,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:31:18,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:31:18,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:31:30,682 WARN L205 SmtUtils]: Spent 10.60 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 20:31:30,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:31:30,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:31:32,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:31:34,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:31:34,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:31:36,764 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_BEFORE_CALL_422 Int) (aux_div_v_main_~y~0_BEFORE_CALL_371_39 Int)) (let ((.cse0 (* 2 v_main_~x~0_BEFORE_CALL_422)) (.cse1 (* aux_div_v_main_~y~0_BEFORE_CALL_371_39 (div (+ (* v_main_~x~0_BEFORE_CALL_422 (- 1)) (* aux_div_v_main_~y~0_BEFORE_CALL_371_39 (- 1))) (* aux_div_v_main_~y~0_BEFORE_CALL_371_39 (- 2)))))) (and (not (= (+ (* 2 aux_div_v_main_~y~0_BEFORE_CALL_371_39) .cse0) (* 4 .cse1))) (< (* 8 .cse1) (* 3 v_main_~x~0_BEFORE_CALL_422)) (= .cse0 (* 6 .cse1))))) is different from false [2021-05-02 20:31:38,771 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_BEFORE_CALL_422 Int) (aux_div_v_main_~y~0_BEFORE_CALL_371_39 Int)) (let ((.cse0 (* 2 v_main_~x~0_BEFORE_CALL_422)) (.cse1 (* aux_div_v_main_~y~0_BEFORE_CALL_371_39 (div (+ (* v_main_~x~0_BEFORE_CALL_422 (- 1)) (* aux_div_v_main_~y~0_BEFORE_CALL_371_39 (- 1))) (* aux_div_v_main_~y~0_BEFORE_CALL_371_39 (- 2)))))) (and (not (= (+ (* 2 aux_div_v_main_~y~0_BEFORE_CALL_371_39) .cse0) (* 4 .cse1))) (< (* 8 .cse1) (* 3 v_main_~x~0_BEFORE_CALL_422)) (= .cse0 (* 6 .cse1))))) is different from true [2021-05-02 20:31:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 147 proven. 167 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2021-05-02 20:31:38,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:31:38,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780413313] [2021-05-02 20:31:38,772 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:31:38,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253557601] [2021-05-02 20:31:38,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253557601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:31:38,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:31:38,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 20:31:38,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419022795] [2021-05-02 20:31:38,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 20:31:38,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:31:38,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 20:31:38,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=402, Unknown=3, NotChecked=40, Total=506 [2021-05-02 20:31:38,773 INFO L87 Difference]: Start difference. First operand 588 states and 774 transitions. Second operand has 23 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 19 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2021-05-02 20:31:47,334 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 43 DAG size of output: 6 [2021-05-02 20:32:25,395 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-05-02 20:32:38,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:38,588 INFO L93 Difference]: Finished difference Result 632 states and 836 transitions. [2021-05-02 20:32:38,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 20:32:38,590 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 19 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) Word has length 160 [2021-05-02 20:32:38,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:38,592 INFO L225 Difference]: With dead ends: 632 [2021-05-02 20:32:38,592 INFO L226 Difference]: Without dead ends: 632 [2021-05-02 20:32:38,592 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 38028.8ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=4, NotChecked=60, Total=1056 [2021-05-02 20:32:38,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-05-02 20:32:38,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 610. [2021-05-02 20:32:38,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 336 states have (on average 1.125) internal successors, (378), 339 states have internal predecessors, (378), 212 states have call successors, (212), 62 states have call predecessors, (212), 61 states have return successors, (210), 208 states have call predecessors, (210), 210 states have call successors, (210) [2021-05-02 20:32:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 800 transitions. [2021-05-02 20:32:38,602 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 800 transitions. Word has length 160 [2021-05-02 20:32:38,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:38,603 INFO L480 AbstractCegarLoop]: Abstraction has 610 states and 800 transitions. [2021-05-02 20:32:38,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 19 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2021-05-02 20:32:38,603 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 800 transitions. [2021-05-02 20:32:38,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-02 20:32:38,604 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:38,604 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-02 20:32:38,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 20:32:38,819 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:38,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:38,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1350776060, now seen corresponding path program 2 times [2021-05-02 20:32:38,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:38,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333254409] [2021-05-02 20:32:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:38,824 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:38,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736201871] [2021-05-02 20:32:38,824 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:38,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:32:38,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:38,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:32:38,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:38,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:38,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:38,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:38,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:38,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:38,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:38,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:38,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:38,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 77 proven. 107 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2021-05-02 20:32:40,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:40,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333254409] [2021-05-02 20:32:40,013 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:40,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736201871] [2021-05-02 20:32:40,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736201871] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:40,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:40,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 20:32:40,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103425864] [2021-05-02 20:32:40,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 20:32:40,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:40,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 20:32:40,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:32:40,014 INFO L87 Difference]: Start difference. First operand 610 states and 800 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-02 20:32:42,758 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-02 20:32:42,988 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-02 20:32:43,650 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-05-02 20:32:44,511 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-05-02 20:32:45,198 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-05-02 20:32:45,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:45,202 INFO L93 Difference]: Finished difference Result 722 states and 980 transitions. [2021-05-02 20:32:45,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 20:32:45,204 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 165 [2021-05-02 20:32:45,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:45,206 INFO L225 Difference]: With dead ends: 722 [2021-05-02 20:32:45,206 INFO L226 Difference]: Without dead ends: 720 [2021-05-02 20:32:45,206 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 3061.7ms TimeCoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 20:32:45,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-05-02 20:32:45,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 687. [2021-05-02 20:32:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 369 states have (on average 1.1382113821138211) internal successors, (420), 373 states have internal predecessors, (420), 255 states have call successors, (255), 63 states have call predecessors, (255), 62 states have return successors, (252), 250 states have call predecessors, (252), 252 states have call successors, (252) [2021-05-02 20:32:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 927 transitions. [2021-05-02 20:32:45,217 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 927 transitions. Word has length 165 [2021-05-02 20:32:45,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:45,217 INFO L480 AbstractCegarLoop]: Abstraction has 687 states and 927 transitions. [2021-05-02 20:32:45,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-02 20:32:45,217 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 927 transitions. [2021-05-02 20:32:45,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-02 20:32:45,218 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:45,218 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-02 20:32:45,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:45,437 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:45,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:45,437 INFO L82 PathProgramCache]: Analyzing trace with hash -399900552, now seen corresponding path program 3 times [2021-05-02 20:32:45,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:45,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631800228] [2021-05-02 20:32:45,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:45,442 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:45,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720556523] [2021-05-02 20:32:45,442 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true