/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-6253b08 [2021-05-06 08:17:39,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:17:39,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:17:39,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:17:39,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:17:39,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:17:39,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:17:39,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:17:39,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:17:39,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:17:39,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:17:39,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:17:39,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:17:39,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:17:39,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:17:39,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:17:39,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:17:39,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:17:39,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:17:39,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:17:39,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:17:39,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:17:39,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:17:39,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:17:39,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:17:39,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:17:39,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:17:39,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:17:39,575 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:17:39,591 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:17:39,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:17:39,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:17:39,593 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:17:39,594 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:17:39,594 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:17:39,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:17:39,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:17:39,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:17:39,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:17:39,595 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:17:39,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:17:39,595 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:17:39,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:17:39,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:17:39,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:17:39,596 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:17:39,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:17:39,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:17:39,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:17:39,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:17:39,598 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:17:39,598 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:17:39,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:17:40,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:17:40,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:17:40,006 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:17:40,006 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:17:40,007 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c [2021-05-06 08:17:40,076 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83f7dd5bd/a9c412325905444389403dccef97e490/FLAG0e265c7e5 [2021-05-06 08:17:40,540 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:17:40,541 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c [2021-05-06 08:17:40,548 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83f7dd5bd/a9c412325905444389403dccef97e490/FLAG0e265c7e5 [2021-05-06 08:17:40,932 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83f7dd5bd/a9c412325905444389403dccef97e490 [2021-05-06 08:17:40,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:17:40,942 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:17:40,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:17:40,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:17:40,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:17:40,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:17:40" (1/1) ... [2021-05-06 08:17:40,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e513606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:40, skipping insertion in model container [2021-05-06 08:17:40,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:17:40" (1/1) ... [2021-05-06 08:17:40,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:17:41,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:17:41,141 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] [2021-05-06 08:17:41,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:17:41,179 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:17:41,208 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] [2021-05-06 08:17:41,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:17:41,258 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:17:41,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:41 WrapperNode [2021-05-06 08:17:41,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:17:41,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:17:41,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:17:41,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:17:41,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:41" (1/1) ... [2021-05-06 08:17:41,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:41" (1/1) ... [2021-05-06 08:17:41,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:41" (1/1) ... [2021-05-06 08:17:41,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:41" (1/1) ... [2021-05-06 08:17:41,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:41" (1/1) ... [2021-05-06 08:17:41,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:41" (1/1) ... [2021-05-06 08:17:41,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:41" (1/1) ... [2021-05-06 08:17:41,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:17:41,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:17:41,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:17:41,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:17:41,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:17:41,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:17:41,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:17:41,413 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:17:41,413 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:17:41,419 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:17:41,419 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:17:41,419 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:17:41,419 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:17:41,420 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:17:41,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:17:41,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:17:41,420 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:17:41,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:17:41,421 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:17:41,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:17:41,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:17:41,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:17:41,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:17:41,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:17:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:17:41,862 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:17:41,862 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:17:41,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:17:41 BoogieIcfgContainer [2021-05-06 08:17:41,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:17:41,864 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:17:41,864 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:17:41,865 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:17:41,867 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:17:41" (1/1) ... [2021-05-06 08:17:41,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:17:41 BasicIcfg [2021-05-06 08:17:41,897 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:17:41,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:17:41,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:17:41,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:17:41,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:17:40" (1/4) ... [2021-05-06 08:17:41,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11032c46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:17:41, skipping insertion in model container [2021-05-06 08:17:41,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:17:41" (2/4) ... [2021-05-06 08:17:41,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11032c46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:17:41, skipping insertion in model container [2021-05-06 08:17:41,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:17:41" (3/4) ... [2021-05-06 08:17:41,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11032c46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:17:41, skipping insertion in model container [2021-05-06 08:17:41,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:17:41" (4/4) ... [2021-05-06 08:17:41,904 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound100.cJordan [2021-05-06 08:17:41,908 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:17:41,911 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:17:41,942 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:17:41,975 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:17:41,975 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:17:41,975 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:17:41,975 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:17:41,975 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:17:41,975 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:17:41,975 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:17:41,975 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:17:41,991 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) [2021-05-06 08:17:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:17:42,000 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:42,001 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] [2021-05-06 08:17:42,001 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:42,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:42,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2021-05-06 08:17:42,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:42,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621722112] [2021-05-06 08:17:42,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:42,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:17:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:42,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:17:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:42,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:17:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:42,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:17:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:42,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:17:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:42,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-06 08:17:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:42,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-06 08:17:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 08:17:42,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:42,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621722112] [2021-05-06 08:17:42,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621722112] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:17:42,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:17:42,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:17:42,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237744225] [2021-05-06 08:17:42,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:17:42,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:42,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:17:42,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:17:42,362 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) [2021-05-06 08:17:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:42,474 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-06 08:17:42,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:17:42,476 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 [2021-05-06 08:17:42,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:42,483 INFO L225 Difference]: With dead ends: 40 [2021-05-06 08:17:42,483 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:17:42,484 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:17:42,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:17:42,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:17:42,516 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) [2021-05-06 08:17:42,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-06 08:17:42,519 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-06 08:17:42,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:42,519 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-06 08:17:42,519 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) [2021-05-06 08:17:42,519 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-06 08:17:42,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 08:17:42,521 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:42,521 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] [2021-05-06 08:17:42,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:17:42,522 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:42,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:42,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2021-05-06 08:17:42,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:42,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028059051] [2021-05-06 08:17:42,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:42,539 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:42,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795454000] [2021-05-06 08:17:42,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:42,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:17:42,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:42,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:42,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:42,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:42,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:42,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 08:17:42,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:42,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028059051] [2021-05-06 08:17:42,904 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:42,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795454000] [2021-05-06 08:17:42,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795454000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:42,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:42,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:17:42,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258654779] [2021-05-06 08:17:42,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:17:42,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:42,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:17:42,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:17:42,911 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) [2021-05-06 08:17:43,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:43,015 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-05-06 08:17:43,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:17:43,016 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 [2021-05-06 08:17:43,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:43,017 INFO L225 Difference]: With dead ends: 44 [2021-05-06 08:17:43,017 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 08:17:43,018 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:17:43,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 08:17:43,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 08:17:43,024 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) [2021-05-06 08:17:43,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-06 08:17:43,025 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-06 08:17:43,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:43,026 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-06 08:17:43,026 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) [2021-05-06 08:17:43,026 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-06 08:17:43,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 08:17:43,027 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:43,027 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] [2021-05-06 08:17:43,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:17:43,247 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:43,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:43,248 INFO L82 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2021-05-06 08:17:43,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:43,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241990612] [2021-05-06 08:17:43,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:43,281 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:43,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920762287] [2021-05-06 08:17:43,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:43,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:17:43,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:43,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:43,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:43,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:43,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:43,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:43,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:43,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:43,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 08:17:43,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:43,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241990612] [2021-05-06 08:17:43,627 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:43,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920762287] [2021-05-06 08:17:43,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920762287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:43,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:43,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:17:43,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190079773] [2021-05-06 08:17:43,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:17:43,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:43,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:17:43,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:17:43,629 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) [2021-05-06 08:17:43,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:43,765 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-05-06 08:17:43,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:17:43,765 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 [2021-05-06 08:17:43,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:43,767 INFO L225 Difference]: With dead ends: 55 [2021-05-06 08:17:43,767 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 08:17:43,767 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:17:43,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 08:17:43,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-06 08:17:43,773 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) [2021-05-06 08:17:43,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-06 08:17:43,774 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-06 08:17:43,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:43,774 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-06 08:17:43,775 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) [2021-05-06 08:17:43,775 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-06 08:17:43,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:17:43,776 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:43,776 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] [2021-05-06 08:17:43,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:43,989 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:43,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:43,990 INFO L82 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2021-05-06 08:17:43,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:43,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993964072] [2021-05-06 08:17:43,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:44,002 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:44,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675333201] [2021-05-06 08:17:44,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:44,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:17:44,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:44,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 08:17:44,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:44,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993964072] [2021-05-06 08:17:44,252 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:44,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675333201] [2021-05-06 08:17:44,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675333201] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:44,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:44,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:17:44,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768147826] [2021-05-06 08:17:44,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:17:44,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:44,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:17:44,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:17:44,256 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:17:44,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:44,376 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-06 08:17:44,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:17:44,377 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2021-05-06 08:17:44,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:44,381 INFO L225 Difference]: With dead ends: 54 [2021-05-06 08:17:44,382 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 08:17:44,388 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:17:44,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 08:17:44,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 08:17:44,401 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) [2021-05-06 08:17:44,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-06 08:17:44,405 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-06 08:17:44,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:44,406 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-06 08:17:44,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:17:44,406 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-06 08:17:44,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 08:17:44,407 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:44,407 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] [2021-05-06 08:17:44,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:44,608 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:44,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:44,609 INFO L82 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2021-05-06 08:17:44,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:44,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539777100] [2021-05-06 08:17:44,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:44,630 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:44,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924202709] [2021-05-06 08:17:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:44,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:17:44,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:44,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:17:44,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:44,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539777100] [2021-05-06 08:17:44,873 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:44,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924202709] [2021-05-06 08:17:44,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924202709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:44,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:44,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:17:44,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397382550] [2021-05-06 08:17:44,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:17:44,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:44,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:17:44,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:17:44,875 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) [2021-05-06 08:17:44,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:44,985 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2021-05-06 08:17:44,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:17:44,985 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 [2021-05-06 08:17:44,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:44,986 INFO L225 Difference]: With dead ends: 58 [2021-05-06 08:17:44,986 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 08:17:44,987 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:17:44,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 08:17:44,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 08:17:44,991 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) [2021-05-06 08:17:44,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-06 08:17:44,992 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-06 08:17:44,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:44,992 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-06 08:17:44,992 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) [2021-05-06 08:17:44,992 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-06 08:17:44,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 08:17:44,993 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:44,993 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] [2021-05-06 08:17:45,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:45,197 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:45,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:45,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2021-05-06 08:17:45,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:45,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100854142] [2021-05-06 08:17:45,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:45,226 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:45,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210455500] [2021-05-06 08:17:45,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:45,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:17:45,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:45,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-06 08:17:45,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:45,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100854142] [2021-05-06 08:17:45,464 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:45,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210455500] [2021-05-06 08:17:45,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210455500] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:45,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:45,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:17:45,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587047300] [2021-05-06 08:17:45,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:17:45,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:45,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:17:45,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:17:45,466 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 08:17:45,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:45,592 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-05-06 08:17:45,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:17:45,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2021-05-06 08:17:45,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:45,598 INFO L225 Difference]: With dead ends: 62 [2021-05-06 08:17:45,598 INFO L226 Difference]: Without dead ends: 62 [2021-05-06 08:17:45,599 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:17:45,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-06 08:17:45,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-06 08:17:45,605 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) [2021-05-06 08:17:45,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-06 08:17:45,606 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-06 08:17:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:45,606 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-06 08:17:45,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 08:17:45,606 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-06 08:17:45,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 08:17:45,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:45,607 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] [2021-05-06 08:17:45,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:17:45,813 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:45,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:45,813 INFO L82 PathProgramCache]: Analyzing trace with hash 14033329, now seen corresponding path program 1 times [2021-05-06 08:17:45,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:45,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976662198] [2021-05-06 08:17:45,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:45,825 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:45,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946469435] [2021-05-06 08:17:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:45,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:17:45,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:45,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:45,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,110 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 08:17:46,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:46,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976662198] [2021-05-06 08:17:46,111 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:46,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946469435] [2021-05-06 08:17:46,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946469435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:46,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:46,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:17:46,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932198817] [2021-05-06 08:17:46,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:17:46,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:46,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:17:46,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:17:46,114 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 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) [2021-05-06 08:17:46,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:46,332 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2021-05-06 08:17:46,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:17:46,332 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 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 67 [2021-05-06 08:17:46,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:46,334 INFO L225 Difference]: With dead ends: 78 [2021-05-06 08:17:46,334 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 08:17:46,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:17:46,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 08:17:46,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2021-05-06 08:17:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:17:46,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-05-06 08:17:46,349 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 67 [2021-05-06 08:17:46,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:46,349 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-05-06 08:17:46,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 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) [2021-05-06 08:17:46,351 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-05-06 08:17:46,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:17:46,352 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:46,353 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] [2021-05-06 08:17:46,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:46,554 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:46,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:46,554 INFO L82 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2021-05-06 08:17:46,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:46,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548842439] [2021-05-06 08:17:46,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:46,567 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:46,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303503319] [2021-05-06 08:17:46,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:46,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:17:46,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:46,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 08:17:46,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:46,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548842439] [2021-05-06 08:17:46,762 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:46,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303503319] [2021-05-06 08:17:46,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303503319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:46,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:46,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:17:46,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109494358] [2021-05-06 08:17:46,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:17:46,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:46,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:17:46,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:17:46,766 INFO L87 Difference]: Start difference. First operand 71 states and 88 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) [2021-05-06 08:17:46,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:46,894 INFO L93 Difference]: Finished difference Result 104 states and 143 transitions. [2021-05-06 08:17:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:17:46,895 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 [2021-05-06 08:17:46,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:46,899 INFO L225 Difference]: With dead ends: 104 [2021-05-06 08:17:46,899 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 08:17:46,899 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:17:46,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 08:17:46,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2021-05-06 08:17:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 35 states have call successors, (35), 9 states have call predecessors, (35), 8 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 08:17:46,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 128 transitions. [2021-05-06 08:17:46,920 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 128 transitions. Word has length 69 [2021-05-06 08:17:46,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:46,921 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 128 transitions. [2021-05-06 08:17:46,921 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) [2021-05-06 08:17:46,921 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 128 transitions. [2021-05-06 08:17:46,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 08:17:46,924 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:46,924 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:47,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:47,148 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:47,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:47,149 INFO L82 PathProgramCache]: Analyzing trace with hash 2044653414, now seen corresponding path program 1 times [2021-05-06 08:17:47,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:47,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163854579] [2021-05-06 08:17:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:47,156 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:47,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724544535] [2021-05-06 08:17:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:47,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:17:47,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:47,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 08:17:47,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:47,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163854579] [2021-05-06 08:17:47,394 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:47,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724544535] [2021-05-06 08:17:47,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724544535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:47,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:47,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:17:47,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499529964] [2021-05-06 08:17:47,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:17:47,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:47,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:17:47,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:17:47,395 INFO L87 Difference]: Start difference. First operand 95 states and 128 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 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) [2021-05-06 08:17:47,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:47,605 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2021-05-06 08:17:47,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:17:47,605 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 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 70 [2021-05-06 08:17:47,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:47,606 INFO L225 Difference]: With dead ends: 109 [2021-05-06 08:17:47,607 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 08:17:47,607 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:17:47,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 08:17:47,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-05-06 08:17:47,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 56 states have internal predecessors, (63), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 08:17:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 131 transitions. [2021-05-06 08:17:47,613 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 131 transitions. Word has length 70 [2021-05-06 08:17:47,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:47,614 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 131 transitions. [2021-05-06 08:17:47,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 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) [2021-05-06 08:17:47,614 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 131 transitions. [2021-05-06 08:17:47,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 08:17:47,615 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:47,615 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] [2021-05-06 08:17:47,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:17:47,825 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:47,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:47,833 INFO L82 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 2 times [2021-05-06 08:17:47,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:47,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974249665] [2021-05-06 08:17:47,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:47,842 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:47,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925755432] [2021-05-06 08:17:47,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:47,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:17:47,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:47,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:17:47,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:48,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 08:17:48,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:48,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974249665] [2021-05-06 08:17:48,293 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:48,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925755432] [2021-05-06 08:17:48,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925755432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:48,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:48,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:17:48,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727492119] [2021-05-06 08:17:48,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:17:48,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:48,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:17:48,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:17:48,307 INFO L87 Difference]: Start difference. First operand 99 states and 131 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 08:17:48,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:48,507 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2021-05-06 08:17:48,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:17:48,508 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2021-05-06 08:17:48,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:48,509 INFO L225 Difference]: With dead ends: 107 [2021-05-06 08:17:48,509 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 08:17:48,509 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:17:48,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 08:17:48,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-06 08:17:48,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 61 states have internal predecessors, (67), 37 states have call successors, (37), 11 states have call predecessors, (37), 10 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 08:17:48,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2021-05-06 08:17:48,524 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 75 [2021-05-06 08:17:48,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:48,524 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2021-05-06 08:17:48,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 08:17:48,524 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2021-05-06 08:17:48,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 08:17:48,526 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:48,526 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] [2021-05-06 08:17:48,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:48,749 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:48,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:48,749 INFO L82 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 3 times [2021-05-06 08:17:48,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:48,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432928351] [2021-05-06 08:17:48,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:48,758 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:48,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441980110] [2021-05-06 08:17:48,758 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 [2021-05-06 08:17:48,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:17:48,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:48,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 08:17:48,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:48,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:48,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-05-06 08:17:49,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:49,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432928351] [2021-05-06 08:17:49,179 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:49,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441980110] [2021-05-06 08:17:49,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441980110] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:49,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:49,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:17:49,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111753856] [2021-05-06 08:17:49,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:17:49,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:49,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:17:49,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:17:49,182 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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) [2021-05-06 08:17:49,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:49,465 INFO L93 Difference]: Finished difference Result 132 states and 173 transitions. [2021-05-06 08:17:49,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:17:49,465 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 [2021-05-06 08:17:49,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:49,469 INFO L225 Difference]: With dead ends: 132 [2021-05-06 08:17:49,469 INFO L226 Difference]: Without dead ends: 132 [2021-05-06 08:17:49,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:17:49,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-06 08:17:49,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2021-05-06 08:17:49,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 74 states have internal predecessors, (82), 45 states have call successors, (45), 13 states have call predecessors, (45), 12 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-06 08:17:49,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 170 transitions. [2021-05-06 08:17:49,481 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 170 transitions. Word has length 80 [2021-05-06 08:17:49,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:49,482 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 170 transitions. [2021-05-06 08:17:49,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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) [2021-05-06 08:17:49,482 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 170 transitions. [2021-05-06 08:17:49,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 08:17:49,484 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:49,484 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] [2021-05-06 08:17:49,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:49,701 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:49,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:49,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 4 times [2021-05-06 08:17:49,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:49,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824773778] [2021-05-06 08:17:49,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:49,710 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:49,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951129063] [2021-05-06 08:17:49,710 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 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 [2021-05-06 08:17:49,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:17:49,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:49,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 08:17:49,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:49,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-05-06 08:17:49,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:49,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824773778] [2021-05-06 08:17:49,969 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:49,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951129063] [2021-05-06 08:17:49,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951129063] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:49,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:49,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:17:49,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365011786] [2021-05-06 08:17:49,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:17:49,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:49,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:17:49,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:17:49,970 INFO L87 Difference]: Start difference. First operand 129 states and 170 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:17:50,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:50,143 INFO L93 Difference]: Finished difference Result 136 states and 176 transitions. [2021-05-06 08:17:50,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:17:50,143 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2021-05-06 08:17:50,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:50,144 INFO L225 Difference]: With dead ends: 136 [2021-05-06 08:17:50,145 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 08:17:50,145 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:17:50,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 08:17:50,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-05-06 08:17:50,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 77 states have internal predecessors, (85), 45 states have call successors, (45), 14 states have call predecessors, (45), 13 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-06 08:17:50,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2021-05-06 08:17:50,151 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 85 [2021-05-06 08:17:50,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:50,151 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2021-05-06 08:17:50,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:17:50,151 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2021-05-06 08:17:50,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 08:17:50,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:50,152 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] [2021-05-06 08:17:50,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:17:50,376 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:50,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:50,376 INFO L82 PathProgramCache]: Analyzing trace with hash 583225195, now seen corresponding path program 2 times [2021-05-06 08:17:50,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:50,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579740348] [2021-05-06 08:17:50,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:50,384 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:50,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878550715] [2021-05-06 08:17:50,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:50,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:17:50,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:50,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:17:50,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:50,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-05-06 08:17:50,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:50,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579740348] [2021-05-06 08:17:50,784 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:50,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878550715] [2021-05-06 08:17:50,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878550715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:50,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:50,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:17:50,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346446925] [2021-05-06 08:17:50,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:17:50,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:50,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:17:50,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:17:50,786 INFO L87 Difference]: Start difference. First operand 133 states and 173 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:17:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:51,219 INFO L93 Difference]: Finished difference Result 150 states and 198 transitions. [2021-05-06 08:17:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:17:51,220 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 89 [2021-05-06 08:17:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:51,221 INFO L225 Difference]: With dead ends: 150 [2021-05-06 08:17:51,221 INFO L226 Difference]: Without dead ends: 150 [2021-05-06 08:17:51,222 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:17:51,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-06 08:17:51,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 143. [2021-05-06 08:17:51,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 82 states have internal predecessors, (91), 49 states have call successors, (49), 15 states have call predecessors, (49), 14 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:17:51,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2021-05-06 08:17:51,232 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 89 [2021-05-06 08:17:51,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:51,234 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2021-05-06 08:17:51,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:17:51,235 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2021-05-06 08:17:51,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 08:17:51,235 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:51,235 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] [2021-05-06 08:17:51,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:17:51,449 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:51,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:51,449 INFO L82 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2021-05-06 08:17:51,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:51,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116348729] [2021-05-06 08:17:51,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:51,458 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:51,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027758455] [2021-05-06 08:17:51,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:51,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 08:17:51,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:51,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-05-06 08:17:51,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:51,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116348729] [2021-05-06 08:17:51,750 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:51,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027758455] [2021-05-06 08:17:51,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027758455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:51,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:51,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:17:51,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634679330] [2021-05-06 08:17:51,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:17:51,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:51,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:17:51,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:17:51,752 INFO L87 Difference]: Start difference. First operand 143 states and 187 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:17:52,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:52,089 INFO L93 Difference]: Finished difference Result 167 states and 218 transitions. [2021-05-06 08:17:52,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:17:52,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 91 [2021-05-06 08:17:52,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:52,090 INFO L225 Difference]: With dead ends: 167 [2021-05-06 08:17:52,090 INFO L226 Difference]: Without dead ends: 166 [2021-05-06 08:17:52,091 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 173.4ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:17:52,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-06 08:17:52,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 156. [2021-05-06 08:17:52,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 90 states have internal predecessors, (100), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-06 08:17:52,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 204 transitions. [2021-05-06 08:17:52,097 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 204 transitions. Word has length 91 [2021-05-06 08:17:52,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:52,097 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 204 transitions. [2021-05-06 08:17:52,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:17:52,098 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 204 transitions. [2021-05-06 08:17:52,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 08:17:52,098 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:52,098 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:52,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:17:52,305 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:52,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:52,305 INFO L82 PathProgramCache]: Analyzing trace with hash -761940128, now seen corresponding path program 1 times [2021-05-06 08:17:52,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:52,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134889869] [2021-05-06 08:17:52,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:52,312 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:52,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061634880] [2021-05-06 08:17:52,312 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 [2021-05-06 08:17:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:17:52,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:17:52,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:52,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-06 08:17:52,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:52,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134889869] [2021-05-06 08:17:52,518 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:52,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061634880] [2021-05-06 08:17:52,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061634880] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:52,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:52,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:17:52,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125240481] [2021-05-06 08:17:52,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:17:52,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:52,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:17:52,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:17:52,520 INFO L87 Difference]: Start difference. First operand 156 states and 204 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 08:17:52,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:52,575 INFO L93 Difference]: Finished difference Result 195 states and 269 transitions. [2021-05-06 08:17:52,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:17:52,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 92 [2021-05-06 08:17:52,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:52,577 INFO L225 Difference]: With dead ends: 195 [2021-05-06 08:17:52,577 INFO L226 Difference]: Without dead ends: 195 [2021-05-06 08:17:52,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:17:52,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-06 08:17:52,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 176. [2021-05-06 08:17:52,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 103 states have internal predecessors, (112), 62 states have call successors, (62), 17 states have call predecessors, (62), 16 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-06 08:17:52,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 234 transitions. [2021-05-06 08:17:52,584 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 234 transitions. Word has length 92 [2021-05-06 08:17:52,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:52,585 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 234 transitions. [2021-05-06 08:17:52,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 08:17:52,585 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 234 transitions. [2021-05-06 08:17:52,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 08:17:52,586 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:52,586 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:17:52,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:52,810 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:52,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:52,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1452951817, now seen corresponding path program 5 times [2021-05-06 08:17:52,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:52,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52963493] [2021-05-06 08:17:52,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:52,819 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:52,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158875674] [2021-05-06 08:17:52,819 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 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 [2021-05-06 08:17:52,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 08:17:52,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:52,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:17:52,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:52,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:52,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:52,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:52,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:52,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:52,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:52,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:52,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:52,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:52,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:52,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:52,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 08:17:53,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:53,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52963493] [2021-05-06 08:17:53,003 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:53,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158875674] [2021-05-06 08:17:53,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158875674] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:17:53,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:17:53,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:17:53,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944477037] [2021-05-06 08:17:53,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:17:53,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:53,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:17:53,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:17:53,004 INFO L87 Difference]: Start difference. First operand 176 states and 234 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 08:17:53,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:53,048 INFO L93 Difference]: Finished difference Result 160 states and 203 transitions. [2021-05-06 08:17:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:17:53,048 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 105 [2021-05-06 08:17:53,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:53,049 INFO L225 Difference]: With dead ends: 160 [2021-05-06 08:17:53,049 INFO L226 Difference]: Without dead ends: 160 [2021-05-06 08:17:53,049 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:17:53,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-06 08:17:53,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2021-05-06 08:17:53,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 89 states have internal predecessors, (92), 49 states have call successors, (49), 17 states have call predecessors, (49), 16 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:17:53,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 188 transitions. [2021-05-06 08:17:53,054 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 188 transitions. Word has length 105 [2021-05-06 08:17:53,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:53,055 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 188 transitions. [2021-05-06 08:17:53,055 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, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 08:17:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 188 transitions. [2021-05-06 08:17:53,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 08:17:53,056 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:53,056 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] [2021-05-06 08:17:53,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:17:53,273 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:53,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 2 times [2021-05-06 08:17:53,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:53,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562402305] [2021-05-06 08:17:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:53,280 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:53,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209807191] [2021-05-06 08:17:53,280 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 [2021-05-06 08:17:53,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:17:53,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:53,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 75 conjunts are in the unsatisfiable core [2021-05-06 08:17:53,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:53,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:53,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 84 proven. 64 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-05-06 08:17:54,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:54,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562402305] [2021-05-06 08:17:54,981 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:54,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209807191] [2021-05-06 08:17:54,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209807191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:54,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:54,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:17:54,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634875744] [2021-05-06 08:17:54,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:17:54,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:54,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:17:54,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:17:54,982 INFO L87 Difference]: Start difference. First operand 150 states and 188 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 08:17:56,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:56,592 INFO L93 Difference]: Finished difference Result 156 states and 193 transitions. [2021-05-06 08:17:56,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:17:56,600 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 107 [2021-05-06 08:17:56,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:56,601 INFO L225 Difference]: With dead ends: 156 [2021-05-06 08:17:56,601 INFO L226 Difference]: Without dead ends: 156 [2021-05-06 08:17:56,602 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 765.6ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:17:56,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-06 08:17:56,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2021-05-06 08:17:56,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 92 states have internal predecessors, (95), 49 states have call successors, (49), 18 states have call predecessors, (49), 17 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:17:56,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 191 transitions. [2021-05-06 08:17:56,607 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 191 transitions. Word has length 107 [2021-05-06 08:17:56,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:56,607 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 191 transitions. [2021-05-06 08:17:56,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 08:17:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 191 transitions. [2021-05-06 08:17:56,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 08:17:56,608 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:56,608 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] [2021-05-06 08:17:56,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:17:56,820 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:56,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:56,821 INFO L82 PathProgramCache]: Analyzing trace with hash 82449829, now seen corresponding path program 3 times [2021-05-06 08:17:56,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:56,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748311441] [2021-05-06 08:17:56,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:56,853 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:56,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241125697] [2021-05-06 08:17:56,854 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 [2021-05-06 08:17:56,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:17:56,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:56,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:17:56,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:57,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 61 proven. 10 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-05-06 08:17:57,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:57,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748311441] [2021-05-06 08:17:57,399 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:57,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241125697] [2021-05-06 08:17:57,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241125697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:57,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:57,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:17:57,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882100518] [2021-05-06 08:17:57,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:17:57,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:57,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:17:57,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:17:57,402 INFO L87 Difference]: Start difference. First operand 154 states and 191 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) [2021-05-06 08:17:57,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:57,459 INFO L93 Difference]: Finished difference Result 158 states and 194 transitions. [2021-05-06 08:17:57,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:17:57,459 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 [2021-05-06 08:17:57,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:57,461 INFO L225 Difference]: With dead ends: 158 [2021-05-06 08:17:57,461 INFO L226 Difference]: Without dead ends: 158 [2021-05-06 08:17:57,461 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:17:57,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-06 08:17:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-05-06 08:17:57,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 95 states have internal predecessors, (98), 49 states have call successors, (49), 19 states have call predecessors, (49), 18 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:17:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 194 transitions. [2021-05-06 08:17:57,468 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 194 transitions. Word has length 111 [2021-05-06 08:17:57,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:57,468 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 194 transitions. [2021-05-06 08:17:57,468 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) [2021-05-06 08:17:57,468 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 194 transitions. [2021-05-06 08:17:57,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 08:17:57,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:57,470 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] [2021-05-06 08:17:57,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:57,695 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:57,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:57,695 INFO L82 PathProgramCache]: Analyzing trace with hash -966740615, now seen corresponding path program 2 times [2021-05-06 08:17:57,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:57,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49343174] [2021-05-06 08:17:57,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:57,705 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:57,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750358612] [2021-05-06 08:17:57,705 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 [2021-05-06 08:17:57,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:17:57,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:57,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-06 08:17:57,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:58,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 93 proven. 32 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-05-06 08:17:58,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:58,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49343174] [2021-05-06 08:17:58,269 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:58,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750358612] [2021-05-06 08:17:58,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750358612] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:58,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:58,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:17:58,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680780152] [2021-05-06 08:17:58,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:17:58,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:58,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:17:58,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:17:58,272 INFO L87 Difference]: Start difference. First operand 158 states and 194 transitions. Second operand has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2021-05-06 08:17:58,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:58,706 INFO L93 Difference]: Finished difference Result 190 states and 239 transitions. [2021-05-06 08:17:58,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:17:58,707 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 113 [2021-05-06 08:17:58,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:58,708 INFO L225 Difference]: With dead ends: 190 [2021-05-06 08:17:58,708 INFO L226 Difference]: Without dead ends: 189 [2021-05-06 08:17:58,709 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:17:58,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-06 08:17:58,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2021-05-06 08:17:58,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 105 states have (on average 1.0952380952380953) internal successors, (115), 110 states have internal predecessors, (115), 61 states have call successors, (61), 21 states have call predecessors, (61), 20 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 08:17:58,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 235 transitions. [2021-05-06 08:17:58,717 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 235 transitions. Word has length 113 [2021-05-06 08:17:58,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:58,718 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 235 transitions. [2021-05-06 08:17:58,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2021-05-06 08:17:58,718 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 235 transitions. [2021-05-06 08:17:58,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 08:17:58,720 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:58,720 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] [2021-05-06 08:17:58,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:17:58,921 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:58,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:58,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1855467922, now seen corresponding path program 3 times [2021-05-06 08:17:58,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:58,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952164923] [2021-05-06 08:17:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:58,927 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:58,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617299356] [2021-05-06 08:17:58,928 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 [2021-05-06 08:17:58,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:17:58,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:59,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:17:59,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:59,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-05-06 08:17:59,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:17:59,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952164923] [2021-05-06 08:17:59,217 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:17:59,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617299356] [2021-05-06 08:17:59,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617299356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:17:59,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:17:59,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:17:59,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226902743] [2021-05-06 08:17:59,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:17:59,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:17:59,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:17:59,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:17:59,219 INFO L87 Difference]: Start difference. First operand 187 states and 235 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) [2021-05-06 08:17:59,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:17:59,413 INFO L93 Difference]: Finished difference Result 226 states and 304 transitions. [2021-05-06 08:17:59,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:17:59,414 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 [2021-05-06 08:17:59,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:17:59,418 INFO L225 Difference]: With dead ends: 226 [2021-05-06 08:17:59,418 INFO L226 Difference]: Without dead ends: 226 [2021-05-06 08:17:59,419 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:17:59,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-06 08:17:59,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 206. [2021-05-06 08:17:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 112 states have (on average 1.125) internal successors, (126), 113 states have internal predecessors, (126), 73 states have call successors, (73), 21 states have call predecessors, (73), 20 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 08:17:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 270 transitions. [2021-05-06 08:17:59,431 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 270 transitions. Word has length 116 [2021-05-06 08:17:59,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:17:59,431 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 270 transitions. [2021-05-06 08:17:59,431 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) [2021-05-06 08:17:59,432 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 270 transitions. [2021-05-06 08:17:59,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-06 08:17:59,433 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:17:59,433 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] [2021-05-06 08:17:59,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:17:59,665 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:17:59,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:17:59,665 INFO L82 PathProgramCache]: Analyzing trace with hash 259955901, now seen corresponding path program 3 times [2021-05-06 08:17:59,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:17:59,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213035940] [2021-05-06 08:17:59,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:17:59,672 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:17:59,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314547841] [2021-05-06 08:17:59,673 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 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 [2021-05-06 08:17:59,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:17:59,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:17:59,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-06 08:17:59,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:17:59,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:17:59,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 66 proven. 38 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-05-06 08:18:00,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:00,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213035940] [2021-05-06 08:18:00,246 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:00,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314547841] [2021-05-06 08:18:00,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314547841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:00,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:00,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:18:00,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034993753] [2021-05-06 08:18:00,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:18:00,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:00,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:18:00,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:18:00,248 INFO L87 Difference]: Start difference. First operand 206 states and 270 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:18:01,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:01,020 INFO L93 Difference]: Finished difference Result 243 states and 318 transitions. [2021-05-06 08:18:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:18:01,022 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2021-05-06 08:18:01,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:01,024 INFO L225 Difference]: With dead ends: 243 [2021-05-06 08:18:01,024 INFO L226 Difference]: Without dead ends: 243 [2021-05-06 08:18:01,024 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 321.3ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:18:01,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-06 08:18:01,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2021-05-06 08:18:01,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 130 states have (on average 1.123076923076923) internal successors, (146), 131 states have internal predecessors, (146), 85 states have call successors, (85), 24 states have call predecessors, (85), 23 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 08:18:01,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 314 transitions. [2021-05-06 08:18:01,032 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 314 transitions. Word has length 127 [2021-05-06 08:18:01,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:01,032 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 314 transitions. [2021-05-06 08:18:01,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:18:01,034 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 314 transitions. [2021-05-06 08:18:01,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-06 08:18:01,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:01,035 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] [2021-05-06 08:18:01,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:18:01,261 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:01,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:01,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1431100670, now seen corresponding path program 4 times [2021-05-06 08:18:01,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:01,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918386635] [2021-05-06 08:18:01,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:01,268 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:01,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085781674] [2021-05-06 08:18:01,276 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 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 [2021-05-06 08:18:01,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:18:01,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:18:01,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-06 08:18:01,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:01,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 89 proven. 108 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-05-06 08:18:01,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:01,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918386635] [2021-05-06 08:18:01,823 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:01,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085781674] [2021-05-06 08:18:01,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085781674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:01,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:01,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:18:01,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480849999] [2021-05-06 08:18:01,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:18:01,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:01,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:18:01,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:18:01,825 INFO L87 Difference]: Start difference. First operand 239 states and 314 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 08:18:02,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:02,359 INFO L93 Difference]: Finished difference Result 246 states and 320 transitions. [2021-05-06 08:18:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:18:02,362 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 129 [2021-05-06 08:18:02,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:02,363 INFO L225 Difference]: With dead ends: 246 [2021-05-06 08:18:02,363 INFO L226 Difference]: Without dead ends: 246 [2021-05-06 08:18:02,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 204.8ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:18:02,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-06 08:18:02,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2021-05-06 08:18:02,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 133 states have (on average 1.1203007518796992) internal successors, (149), 134 states have internal predecessors, (149), 85 states have call successors, (85), 25 states have call predecessors, (85), 24 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 08:18:02,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 317 transitions. [2021-05-06 08:18:02,371 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 317 transitions. Word has length 129 [2021-05-06 08:18:02,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:02,371 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 317 transitions. [2021-05-06 08:18:02,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 08:18:02,372 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 317 transitions. [2021-05-06 08:18:02,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 08:18:02,373 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:02,373 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] [2021-05-06 08:18:02,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 08:18:02,574 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:02,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:02,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1491357193, now seen corresponding path program 5 times [2021-05-06 08:18:02,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:02,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627897606] [2021-05-06 08:18:02,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:02,581 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:02,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140177108] [2021-05-06 08:18:02,581 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 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 [2021-05-06 08:18:02,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:18:02,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:18:02,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-06 08:18:02,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:02,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:02,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:02,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:02,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:03,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:03,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:03,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:03,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:03,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:03,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:03,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:03,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:03,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:03,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:03,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:03,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:03,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:03,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:03,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 92 proven. 110 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-05-06 08:18:03,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:03,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627897606] [2021-05-06 08:18:03,218 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:03,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140177108] [2021-05-06 08:18:03,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140177108] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:03,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:03,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:18:03,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797229433] [2021-05-06 08:18:03,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:18:03,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:03,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:18:03,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:18:03,220 INFO L87 Difference]: Start difference. First operand 243 states and 317 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 08:18:03,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:18:03,840 INFO L93 Difference]: Finished difference Result 255 states and 327 transitions. [2021-05-06 08:18:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:18:03,841 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 132 [2021-05-06 08:18:03,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:18:03,842 INFO L225 Difference]: With dead ends: 255 [2021-05-06 08:18:03,842 INFO L226 Difference]: Without dead ends: 255 [2021-05-06 08:18:03,842 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 287.3ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:18:03,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-06 08:18:03,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 251. [2021-05-06 08:18:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 139 states have (on average 1.1151079136690647) internal successors, (155), 140 states have internal predecessors, (155), 85 states have call successors, (85), 27 states have call predecessors, (85), 26 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 08:18:03,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 323 transitions. [2021-05-06 08:18:03,852 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 323 transitions. Word has length 132 [2021-05-06 08:18:03,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:18:03,852 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 323 transitions. [2021-05-06 08:18:03,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 08:18:03,852 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 323 transitions. [2021-05-06 08:18:03,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-06 08:18:03,853 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:18:03,853 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] [2021-05-06 08:18:04,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:18:04,054 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:18:04,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:18:04,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1694952883, now seen corresponding path program 4 times [2021-05-06 08:18:04,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:18:04,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401222729] [2021-05-06 08:18:04,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:18:04,061 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:18:04,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036740706] [2021-05-06 08:18:04,062 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 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 [2021-05-06 08:18:04,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:18:04,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:18:04,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 08:18:04,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:18:04,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:04,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:04,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:04,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:04,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:04,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:04,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:04,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:04,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:04,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:04,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:04,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:04,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:04,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:04,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:04,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:38,689 WARN L205 SmtUtils]: Spent 33.93 s on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-05-06 08:18:38,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:38,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:38,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:38,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:38,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:38,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:38,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:38,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:38,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:18:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 121 proven. 93 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-05-06 08:18:38,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:18:38,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401222729] [2021-05-06 08:18:38,956 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:18:38,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036740706] [2021-05-06 08:18:38,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036740706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:18:38,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:18:38,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:18:38,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049273054] [2021-05-06 08:18:38,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:18:38,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:18:38,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:18:38,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:18:38,958 INFO L87 Difference]: Start difference. First operand 251 states and 323 transitions. Second operand has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 11 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) [2021-05-06 08:19:08,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:19:08,819 INFO L93 Difference]: Finished difference Result 294 states and 383 transitions. [2021-05-06 08:19:08,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:19:08,820 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 11 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) Word has length 135 [2021-05-06 08:19:08,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:19:08,822 INFO L225 Difference]: With dead ends: 294 [2021-05-06 08:19:08,822 INFO L226 Difference]: Without dead ends: 293 [2021-05-06 08:19:08,822 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 34481.2ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:19:08,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-06 08:19:08,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 290. [2021-05-06 08:19:08,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 159 states have (on average 1.119496855345912) internal successors, (178), 160 states have internal predecessors, (178), 101 states have call successors, (101), 30 states have call predecessors, (101), 29 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-06 08:19:08,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 378 transitions. [2021-05-06 08:19:08,832 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 378 transitions. Word has length 135 [2021-05-06 08:19:08,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:19:08,832 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 378 transitions. [2021-05-06 08:19:08,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 11 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 10 states have call successors, (23) [2021-05-06 08:19:08,832 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 378 transitions. [2021-05-06 08:19:08,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-06 08:19:08,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:19:08,833 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] [2021-05-06 08:19:09,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:19:09,058 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:19:09,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:19:09,059 INFO L82 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 5 times [2021-05-06 08:19:09,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:19:09,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807336353] [2021-05-06 08:19:09,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:19:09,066 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:19:09,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267037451] [2021-05-06 08:19:09,066 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 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 [2021-05-06 08:19:09,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:19:09,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:19:09,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-06 08:19:09,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:19:09,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 44 proven. 55 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2021-05-06 08:19:09,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:19:09,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807336353] [2021-05-06 08:19:09,710 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:19:09,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267037451] [2021-05-06 08:19:09,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267037451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:19:09,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:19:09,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:19:09,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018594247] [2021-05-06 08:19:09,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:19:09,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:19:09,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:19:09,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:19:09,713 INFO L87 Difference]: Start difference. First operand 290 states and 378 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) [2021-05-06 08:19:10,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:19:10,919 INFO L93 Difference]: Finished difference Result 330 states and 436 transitions. [2021-05-06 08:19:10,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:19:10,920 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) Word has length 138 [2021-05-06 08:19:10,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:19:10,921 INFO L225 Difference]: With dead ends: 330 [2021-05-06 08:19:10,921 INFO L226 Difference]: Without dead ends: 325 [2021-05-06 08:19:10,921 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 346.4ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:19:10,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-06 08:19:10,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 300. [2021-05-06 08:19:10,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 164 states have (on average 1.1219512195121952) internal successors, (184), 165 states have internal predecessors, (184), 105 states have call successors, (105), 31 states have call predecessors, (105), 30 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2021-05-06 08:19:10,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 392 transitions. [2021-05-06 08:19:10,937 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 392 transitions. Word has length 138 [2021-05-06 08:19:10,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:19:10,938 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 392 transitions. [2021-05-06 08:19:10,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 7 states have call successors, (23) [2021-05-06 08:19:10,938 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 392 transitions. [2021-05-06 08:19:10,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 08:19:10,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:19:10,940 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] [2021-05-06 08:19:11,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:19:11,165 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:19:11,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:19:11,165 INFO L82 PathProgramCache]: Analyzing trace with hash 336218627, now seen corresponding path program 6 times [2021-05-06 08:19:11,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:19:11,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97903296] [2021-05-06 08:19:11,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:19:11,170 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:19:11,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038357819] [2021-05-06 08:19:11,171 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 [2021-05-06 08:19:12,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 08:19:12,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:19:12,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-06 08:19:12,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:19:12,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:12,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:13,440 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-05-06 08:19:14,000 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-06 08:19:14,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:19:14,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:20:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 53 proven. 93 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2021-05-06 08:20:42,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:20:42,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97903296] [2021-05-06 08:20:42,836 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:20:42,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038357819] [2021-05-06 08:20:42,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038357819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:20:42,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:20:42,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:20:42,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437568936] [2021-05-06 08:20:42,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:20:42,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:20:42,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:20:42,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:20:42,837 INFO L87 Difference]: Start difference. First operand 300 states and 392 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-05-06 08:20:45,021 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-06 08:22:03,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:03,245 INFO L93 Difference]: Finished difference Result 341 states and 443 transitions. [2021-05-06 08:22:03,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:22:03,246 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 149 [2021-05-06 08:22:03,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:03,247 INFO L225 Difference]: With dead ends: 341 [2021-05-06 08:22:03,247 INFO L226 Difference]: Without dead ends: 341 [2021-05-06 08:22:03,247 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 2003.4ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:22:03,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-05-06 08:22:03,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 308. [2021-05-06 08:22:03,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 170 states have (on average 1.1176470588235294) internal successors, (190), 171 states have internal predecessors, (190), 105 states have call successors, (105), 33 states have call predecessors, (105), 32 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2021-05-06 08:22:03,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 398 transitions. [2021-05-06 08:22:03,261 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 398 transitions. Word has length 149 [2021-05-06 08:22:03,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:03,261 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 398 transitions. [2021-05-06 08:22:03,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-05-06 08:22:03,261 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 398 transitions. [2021-05-06 08:22:03,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 08:22:03,262 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:03,262 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] [2021-05-06 08:22:03,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:03,470 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:03,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:03,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1855514487, now seen corresponding path program 7 times [2021-05-06 08:22:03,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:03,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605702938] [2021-05-06 08:22:03,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:03,478 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:03,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577214946] [2021-05-06 08:22:03,479 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 [2021-05-06 08:22:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:03,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 86 conjunts are in the unsatisfiable core [2021-05-06 08:22:03,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:03,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:03,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:03,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:03,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:03,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:03,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:03,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:03,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:03,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,641 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-06 08:22:04,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 100 proven. 190 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-05-06 08:22:04,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:04,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605702938] [2021-05-06 08:22:04,706 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:04,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577214946] [2021-05-06 08:22:04,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577214946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:04,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:04,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:22:04,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617755431] [2021-05-06 08:22:04,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:22:04,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:04,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:22:04,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:04,708 INFO L87 Difference]: Start difference. First operand 308 states and 398 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 08:22:06,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:06,360 INFO L93 Difference]: Finished difference Result 346 states and 447 transitions. [2021-05-06 08:22:06,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:22:06,361 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) Word has length 149 [2021-05-06 08:22:06,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:06,363 INFO L225 Difference]: With dead ends: 346 [2021-05-06 08:22:06,363 INFO L226 Difference]: Without dead ends: 346 [2021-05-06 08:22:06,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1103.6ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:22:06,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-06 08:22:06,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 341. [2021-05-06 08:22:06,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 188 states have (on average 1.1170212765957446) internal successors, (210), 189 states have internal predecessors, (210), 117 states have call successors, (117), 36 states have call predecessors, (117), 35 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-06 08:22:06,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 442 transitions. [2021-05-06 08:22:06,372 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 442 transitions. Word has length 149 [2021-05-06 08:22:06,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:06,373 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 442 transitions. [2021-05-06 08:22:06,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 08:22:06,373 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 442 transitions. [2021-05-06 08:22:06,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-06 08:22:06,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:06,374 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] [2021-05-06 08:22:06,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 08:22:06,589 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:06,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1402624196, now seen corresponding path program 8 times [2021-05-06 08:22:06,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:06,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818288204] [2021-05-06 08:22:06,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:06,595 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:06,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999889493] [2021-05-06 08:22:06,596 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 [2021-05-06 08:22:06,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:06,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:06,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 78 conjunts are in the unsatisfiable core [2021-05-06 08:22:06,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:06,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,640 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-06 08:22:07,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 203 proven. 127 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2021-05-06 08:22:07,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:07,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818288204] [2021-05-06 08:22:07,770 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:07,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999889493] [2021-05-06 08:22:07,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999889493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:07,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:07,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:22:07,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117043037] [2021-05-06 08:22:07,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:22:07,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:07,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:22:07,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:07,772 INFO L87 Difference]: Start difference. First operand 341 states and 442 transitions. Second operand has 17 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2021-05-06 08:22:09,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:09,131 INFO L93 Difference]: Finished difference Result 373 states and 486 transitions. [2021-05-06 08:22:09,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:22:09,132 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 151 [2021-05-06 08:22:09,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:09,134 INFO L225 Difference]: With dead ends: 373 [2021-05-06 08:22:09,134 INFO L226 Difference]: Without dead ends: 373 [2021-05-06 08:22:09,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 708.6ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:22:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-06 08:22:09,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 348. [2021-05-06 08:22:09,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 192 states have (on average 1.1145833333333333) internal successors, (214), 194 states have internal predecessors, (214), 120 states have call successors, (120), 36 states have call predecessors, (120), 35 states have return successors, (118), 117 states have call predecessors, (118), 118 states have call successors, (118) [2021-05-06 08:22:09,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 452 transitions. [2021-05-06 08:22:09,144 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 452 transitions. Word has length 151 [2021-05-06 08:22:09,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:09,145 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 452 transitions. [2021-05-06 08:22:09,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2021-05-06 08:22:09,145 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 452 transitions. [2021-05-06 08:22:09,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-06 08:22:09,146 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:09,147 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] [2021-05-06 08:22:09,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-06 08:22:09,361 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:09,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:09,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1866948721, now seen corresponding path program 9 times [2021-05-06 08:22:09,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:09,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134252896] [2021-05-06 08:22:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:09,367 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:09,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133811791] [2021-05-06 08:22:09,368 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 [2021-05-06 08:22:09,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:22:09,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:09,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-06 08:22:09,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:10,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,741 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-05-06 08:22:10,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 103 proven. 46 refuted. 0 times theorem prover too weak. 696 trivial. 0 not checked. [2021-05-06 08:22:10,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:10,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134252896] [2021-05-06 08:22:10,788 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:10,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133811791] [2021-05-06 08:22:10,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133811791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:10,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:10,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:22:10,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977398522] [2021-05-06 08:22:10,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:22:10,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:10,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:22:10,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:10,789 INFO L87 Difference]: Start difference. First operand 348 states and 452 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 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) [2021-05-06 08:22:11,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:11,731 INFO L93 Difference]: Finished difference Result 381 states and 498 transitions. [2021-05-06 08:22:11,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:22:11,731 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 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 [2021-05-06 08:22:11,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:11,734 INFO L225 Difference]: With dead ends: 381 [2021-05-06 08:22:11,734 INFO L226 Difference]: Without dead ends: 381 [2021-05-06 08:22:11,735 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 691.9ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:22:11,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-05-06 08:22:11,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 319. [2021-05-06 08:22:11,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 177 states have (on average 1.11864406779661) internal successors, (198), 179 states have internal predecessors, (198), 108 states have call successors, (108), 34 states have call predecessors, (108), 33 states have return successors, (106), 105 states have call predecessors, (106), 106 states have call successors, (106) [2021-05-06 08:22:11,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 412 transitions. [2021-05-06 08:22:11,744 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 412 transitions. Word has length 154 [2021-05-06 08:22:11,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:11,744 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 412 transitions. [2021-05-06 08:22:11,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 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) [2021-05-06 08:22:11,745 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 412 transitions. [2021-05-06 08:22:11,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-06 08:22:11,746 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:11,746 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] [2021-05-06 08:22:11,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:11,954 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:11,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:11,954 INFO L82 PathProgramCache]: Analyzing trace with hash 742722429, now seen corresponding path program 10 times [2021-05-06 08:22:11,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:11,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528163682] [2021-05-06 08:22:11,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:11,965 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:11,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537442954] [2021-05-06 08:22:11,965 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 [2021-05-06 08:22:12,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:22:12,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:12,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 101 conjunts are in the unsatisfiable core [2021-05-06 08:22:12,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:12,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 177 proven. 188 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-05-06 08:22:12,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:12,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528163682] [2021-05-06 08:22:12,849 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:12,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537442954] [2021-05-06 08:22:12,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537442954] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:12,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:12,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:22:12,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763135104] [2021-05-06 08:22:12,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:22:12,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:12,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:22:12,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:12,850 INFO L87 Difference]: Start difference. First operand 319 states and 412 transitions. Second operand has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-05-06 08:22:13,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:13,869 INFO L93 Difference]: Finished difference Result 414 states and 543 transitions. [2021-05-06 08:22:13,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:22:13,869 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) Word has length 154 [2021-05-06 08:22:13,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:13,871 INFO L225 Difference]: With dead ends: 414 [2021-05-06 08:22:13,872 INFO L226 Difference]: Without dead ends: 414 [2021-05-06 08:22:13,872 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 134 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 599.5ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:22:13,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-06 08:22:13,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 410. [2021-05-06 08:22:13,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 225 states have (on average 1.1244444444444444) internal successors, (253), 227 states have internal predecessors, (253), 144 states have call successors, (144), 41 states have call predecessors, (144), 40 states have return successors, (142), 141 states have call predecessors, (142), 142 states have call successors, (142) [2021-05-06 08:22:13,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 539 transitions. [2021-05-06 08:22:13,882 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 539 transitions. Word has length 154 [2021-05-06 08:22:13,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:13,882 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 539 transitions. [2021-05-06 08:22:13,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-05-06 08:22:13,883 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 539 transitions. [2021-05-06 08:22:13,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-06 08:22:13,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:13,884 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] [2021-05-06 08:22:14,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-06 08:22:14,097 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:14,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:14,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1947214227, now seen corresponding path program 6 times [2021-05-06 08:22:14,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:14,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180350803] [2021-05-06 08:22:14,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:14,103 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:14,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [363889803] [2021-05-06 08:22:14,103 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 [2021-05-06 08:22:14,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 08:22:14,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:14,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 08:22:14,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:14,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 87 proven. 43 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2021-05-06 08:22:14,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:14,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180350803] [2021-05-06 08:22:14,588 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:14,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363889803] [2021-05-06 08:22:14,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363889803] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:14,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:14,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:14,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873904625] [2021-05-06 08:22:14,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:14,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:14,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:14,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:14,591 INFO L87 Difference]: Start difference. First operand 410 states and 539 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 08:22:14,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:14,927 INFO L93 Difference]: Finished difference Result 432 states and 556 transitions. [2021-05-06 08:22:14,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:22:14,928 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 157 [2021-05-06 08:22:14,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:14,930 INFO L225 Difference]: With dead ends: 432 [2021-05-06 08:22:14,930 INFO L226 Difference]: Without dead ends: 431 [2021-05-06 08:22:14,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:22:14,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-05-06 08:22:14,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 430. [2021-05-06 08:22:14,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 240 states have (on average 1.1125) internal successors, (267), 242 states have internal predecessors, (267), 144 states have call successors, (144), 46 states have call predecessors, (144), 45 states have return successors, (142), 141 states have call predecessors, (142), 142 states have call successors, (142) [2021-05-06 08:22:14,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 553 transitions. [2021-05-06 08:22:14,941 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 553 transitions. Word has length 157 [2021-05-06 08:22:14,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:14,941 INFO L480 AbstractCegarLoop]: Abstraction has 430 states and 553 transitions. [2021-05-06 08:22:14,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 08:22:14,941 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 553 transitions. [2021-05-06 08:22:14,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-06 08:22:14,943 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:14,943 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] [2021-05-06 08:22:15,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:15,165 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:15,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:15,165 INFO L82 PathProgramCache]: Analyzing trace with hash 915217378, now seen corresponding path program 7 times [2021-05-06 08:22:15,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:15,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931240160] [2021-05-06 08:22:15,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:15,172 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:15,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714682152] [2021-05-06 08:22:15,172 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 [2021-05-06 08:22:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:15,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-06 08:22:15,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:15,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,084 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-06 08:22:16,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,573 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-05-06 08:22:16,927 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-05-06 08:22:17,183 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-05-06 08:22:17,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 183 proven. 131 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2021-05-06 08:22:17,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:17,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931240160] [2021-05-06 08:22:17,293 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:17,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714682152] [2021-05-06 08:22:17,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714682152] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:17,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:17,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:22:17,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449646326] [2021-05-06 08:22:17,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 08:22:17,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:17,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 08:22:17,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:22:17,295 INFO L87 Difference]: Start difference. First operand 430 states and 553 transitions. Second operand has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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) [2021-05-06 08:22:18,401 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-05-06 08:22:18,642 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-06 08:22:19,002 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-05-06 08:22:20,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:20,023 INFO L93 Difference]: Finished difference Result 463 states and 606 transitions. [2021-05-06 08:22:20,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:22:20,024 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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 [2021-05-06 08:22:20,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:20,024 INFO L225 Difference]: With dead ends: 463 [2021-05-06 08:22:20,024 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:22:20,025 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2610.7ms TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-05-06 08:22:20,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:22:20,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:22:20,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 08:22:20,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:22:20,025 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 160 [2021-05-06 08:22:20,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:20,025 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:22:20,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 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) [2021-05-06 08:22:20,026 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:22:20,026 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:22:20,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-06 08:22:20,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:22:20 BasicIcfg [2021-05-06 08:22:20,240 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:22:20,241 INFO L168 Benchmark]: Toolchain (without parser) took 279299.00 ms. Allocated memory was 191.9 MB in the beginning and 399.5 MB in the end (delta: 207.6 MB). Free memory was 157.4 MB in the beginning and 289.3 MB in the end (delta: -131.9 MB). Peak memory consumption was 76.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:20,241 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 191.9 MB. Free memory is still 173.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:22:20,241 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.96 ms. Allocated memory is still 191.9 MB. Free memory was 157.2 MB in the beginning and 174.6 MB in the end (delta: -17.5 MB). Peak memory consumption was 12.2 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:20,241 INFO L168 Benchmark]: Boogie Preprocessor took 39.30 ms. Allocated memory is still 191.9 MB. Free memory was 174.6 MB in the beginning and 173.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:20,241 INFO L168 Benchmark]: RCFGBuilder took 561.85 ms. Allocated memory is still 191.9 MB. Free memory was 173.1 MB in the beginning and 155.8 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:20,241 INFO L168 Benchmark]: IcfgTransformer took 33.09 ms. Allocated memory is still 191.9 MB. Free memory was 155.8 MB in the beginning and 154.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:20,241 INFO L168 Benchmark]: TraceAbstraction took 278341.82 ms. Allocated memory was 191.9 MB in the beginning and 399.5 MB in the end (delta: 207.6 MB). Free memory was 154.2 MB in the beginning and 289.3 MB in the end (delta: -135.1 MB). Peak memory consumption was 74.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:20,241 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 191.9 MB. Free memory is still 173.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 312.96 ms. Allocated memory is still 191.9 MB. Free memory was 157.2 MB in the beginning and 174.6 MB in the end (delta: -17.5 MB). Peak memory consumption was 12.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.30 ms. Allocated memory is still 191.9 MB. Free memory was 174.6 MB in the beginning and 173.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 561.85 ms. Allocated memory is still 191.9 MB. Free memory was 173.1 MB in the beginning and 155.8 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 33.09 ms. Allocated memory is still 191.9 MB. Free memory was 155.8 MB in the beginning and 154.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 278341.82 ms. Allocated memory was 191.9 MB in the beginning and 399.5 MB in the end (delta: 207.6 MB). Free memory was 154.2 MB in the beginning and 289.3 MB in the end (delta: -135.1 MB). Peak memory consumption was 74.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 278264.5ms, OverallIterations: 32, TraceHistogramMax: 21, EmptinessCheckTime: 50.3ms, AutomataDifference: 126690.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1552 SDtfs, 902 SDslu, 9999 SDs, 0 SdLazy, 11332 SolverSat, 1055 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 120820.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3393 GetRequests, 2925 SyntacticMatches, 22 SemanticMatches, 446 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 46170.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=430occurred in iteration=31, InterpolantAutomatonStates: 364, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 307.7ms AutomataMinimizationTime, 32 MinimizatonAttempts, 293 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 350.6ms SsaConstructionTime, 2881.8ms SatisfiabilityAnalysisTime, 139831.4ms InterpolantComputationTime, 3302 NumberOfCodeBlocks, 2929 NumberOfCodeBlocksAsserted, 75 NumberOfCheckSat, 3270 ConstructedInterpolants, 0 QuantifiedInterpolants, 22158 SizeOfPredicates, 248 NumberOfNonLiveVariables, 8238 ConjunctsInSsa, 1255 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 10620/12120 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...