/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:34:03,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:34:03,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:34:03,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:34:03,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:34:03,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:34:03,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:34:03,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:34:03,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:34:03,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:34:03,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:34:03,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:34:03,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:34:03,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:34:03,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:34:03,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:34:03,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:34:03,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:34:03,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:34:03,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:34:03,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:34:03,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:34:03,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:34:03,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:34:03,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:34:03,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:34:03,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:34:03,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:34:03,532 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:34:03,545 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:34:03,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:34:03,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:34:03,549 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:34:03,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:34:03,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:34:03,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:34:03,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:34:03,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:34:03,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:34:03,549 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:34:03,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:34:03,550 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:34:03,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:34:03,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:34:03,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:34:03,550 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:34:03,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:34:03,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:34:03,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:34:03,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:34:03,552 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:34:03,552 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:34:03,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:34:03,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:34:03,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:34:03,919 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:34:03,920 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:34:03,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c [2021-05-02 20:34:03,980 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/595855ec5/3bdf68b43ed4455488e2833fb043a66d/FLAG501c6f899 [2021-05-02 20:34:04,535 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:34:04,536 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c [2021-05-02 20:34:04,544 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/595855ec5/3bdf68b43ed4455488e2833fb043a66d/FLAG501c6f899 [2021-05-02 20:34:05,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/595855ec5/3bdf68b43ed4455488e2833fb043a66d [2021-05-02 20:34:05,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:34:05,009 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:34:05,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:34:05,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:34:05,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:34:05,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:34:05" (1/1) ... [2021-05-02 20:34:05,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f87295d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:05, skipping insertion in model container [2021-05-02 20:34:05,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:34:05" (1/1) ... [2021-05-02 20:34:05,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:34:05,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:34:05,136 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c[490,503] [2021-05-02 20:34:05,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:34:05,161 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:34:05,205 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c[490,503] [2021-05-02 20:34:05,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:34:05,247 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:34:05,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:05 WrapperNode [2021-05-02 20:34:05,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:34:05,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:34:05,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:34:05,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:34:05,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:05" (1/1) ... [2021-05-02 20:34:05,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:05" (1/1) ... [2021-05-02 20:34:05,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:05" (1/1) ... [2021-05-02 20:34:05,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:05" (1/1) ... [2021-05-02 20:34:05,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:05" (1/1) ... [2021-05-02 20:34:05,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:05" (1/1) ... [2021-05-02 20:34:05,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:05" (1/1) ... [2021-05-02 20:34:05,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:34:05,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:34:05,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:34:05,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:34:05,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:34:05,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:34:05,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:34:05,384 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:34:05,384 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:34:05,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:34:05,385 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:34:05,385 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:34:05,385 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:34:05,385 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:34:05,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:34:05,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:34:05,386 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:34:05,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:34:05,386 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:34:05,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:34:05,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:34:05,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:34:05,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:34:05,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:34:05,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:34:05,732 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:34:05,732 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 20:34:05,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:34:05 BoogieIcfgContainer [2021-05-02 20:34:05,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:34:05,734 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:34:05,734 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:34:05,735 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:34:05,737 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:34:05" (1/1) ... [2021-05-02 20:34:05,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:34:05 BasicIcfg [2021-05-02 20:34:05,753 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:34:05,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:34:05,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:34:05,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:34:05,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:34:05" (1/4) ... [2021-05-02 20:34:05,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24363856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:34:05, skipping insertion in model container [2021-05-02 20:34:05,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:05" (2/4) ... [2021-05-02 20:34:05,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24363856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:34:05, skipping insertion in model container [2021-05-02 20:34:05,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:34:05" (3/4) ... [2021-05-02 20:34:05,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24363856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:34:05, skipping insertion in model container [2021-05-02 20:34:05,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:34:05" (4/4) ... [2021-05-02 20:34:05,767 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.cJordan [2021-05-02 20:34:05,772 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:34:05,776 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:34:05,791 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:34:05,817 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:34:05,817 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:34:05,817 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:34:05,817 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:34:05,817 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:34:05,817 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:34:05,817 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:34:05,817 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:34:05,834 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:34:05,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:34:05,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:05,846 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:05,847 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:05,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:05,856 INFO L82 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2021-05-02 20:34:05,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:05,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124770353] [2021-05-02 20:34:05,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:06,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:34:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:06,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:34:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:06,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:34:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:06,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:34:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:06,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:34:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:06,054 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:34:06,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:06,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124770353] [2021-05-02 20:34:06,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124770353] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:06,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:06,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:34:06,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867663527] [2021-05-02 20:34:06,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:34:06,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:06,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:34:06,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:34:06,074 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:34:06,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:06,214 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-05-02 20:34:06,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:34:06,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:34:06,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:06,222 INFO L225 Difference]: With dead ends: 40 [2021-05-02 20:34:06,222 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:34:06,229 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:34:06,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:34:06,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:34:06,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:34:06,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 20:34:06,258 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-02 20:34:06,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:06,259 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 20:34:06,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:34:06,259 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 20:34:06,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 20:34:06,261 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:06,261 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:06,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:34:06,261 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:06,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:06,262 INFO L82 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2021-05-02 20:34:06,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:06,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229925750] [2021-05-02 20:34:06,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:06,282 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:06,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640746081] [2021-05-02 20:34:06,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:06,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:34:06,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:06,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:34:06,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:06,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229925750] [2021-05-02 20:34:06,531 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:06,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640746081] [2021-05-02 20:34:06,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640746081] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:06,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:06,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:34:06,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460190926] [2021-05-02 20:34:06,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:34:06,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:06,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:34:06,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:34:06,534 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:34:06,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:06,657 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-02 20:34:06,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:34:06,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-02 20:34:06,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:06,660 INFO L225 Difference]: With dead ends: 47 [2021-05-02 20:34:06,661 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 20:34:06,664 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:34:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 20:34:06,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-02 20:34:06,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:34:06,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 20:34:06,687 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-02 20:34:06,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:06,689 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 20:34:06,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:34:06,692 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 20:34:06,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 20:34:06,693 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:06,693 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:06,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:34:06,909 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:06,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:06,910 INFO L82 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2021-05-02 20:34:06,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:06,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26445358] [2021-05-02 20:34:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:06,929 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:06,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412006989] [2021-05-02 20:34:06,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:07,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:34:07,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:07,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:34:07,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:07,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26445358] [2021-05-02 20:34:07,334 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:07,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412006989] [2021-05-02 20:34:07,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412006989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:07,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:07,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:34:07,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950197961] [2021-05-02 20:34:07,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:34:07,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:07,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:34:07,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:34:07,339 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:34:07,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:07,465 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-05-02 20:34:07,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:34:07,466 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-02 20:34:07,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:07,468 INFO L225 Difference]: With dead ends: 51 [2021-05-02 20:34:07,469 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 20:34:07,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:34:07,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 20:34:07,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 20:34:07,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:34:07,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-02 20:34:07,479 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-02 20:34:07,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:07,479 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-02 20:34:07,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:34:07,479 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-02 20:34:07,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:34:07,480 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:07,481 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:07,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:07,685 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:07,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:07,685 INFO L82 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2021-05-02 20:34:07,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:07,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810094136] [2021-05-02 20:34:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:07,699 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:07,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233580539] [2021-05-02 20:34:07,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:07,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:34:07,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:07,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:34:07,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:07,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810094136] [2021-05-02 20:34:07,896 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:07,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233580539] [2021-05-02 20:34:07,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233580539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:07,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:07,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:34:07,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234664109] [2021-05-02 20:34:07,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:34:07,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:07,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:34:07,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:34:07,897 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:34:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:08,112 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2021-05-02 20:34:08,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:34:08,113 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 20:34:08,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:08,114 INFO L225 Difference]: With dead ends: 96 [2021-05-02 20:34:08,114 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 20:34:08,114 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:34:08,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 20:34:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-02 20:34:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:34:08,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-02 20:34:08,123 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-02 20:34:08,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:08,123 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-02 20:34:08,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:34:08,123 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-02 20:34:08,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:34:08,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:08,124 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:08,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:08,333 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:08,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:08,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2021-05-02 20:34:08,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:08,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141385140] [2021-05-02 20:34:08,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:08,347 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:08,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087580866] [2021-05-02 20:34:08,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:08,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:08,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:34:08,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:08,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:34:08,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:08,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141385140] [2021-05-02 20:34:08,607 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:08,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087580866] [2021-05-02 20:34:08,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087580866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:08,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:08,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:34:08,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909805142] [2021-05-02 20:34:08,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:34:08,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:08,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:34:08,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:34:08,609 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:34:08,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:08,761 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2021-05-02 20:34:08,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:34:08,763 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-02 20:34:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:08,767 INFO L225 Difference]: With dead ends: 77 [2021-05-02 20:34:08,767 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 20:34:08,769 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:34:08,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 20:34:08,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-05-02 20:34:08,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:34:08,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-02 20:34:08,784 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-02 20:34:08,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:08,784 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-02 20:34:08,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:34:08,784 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-02 20:34:08,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 20:34:08,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:08,785 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:08,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:08,997 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:08,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:08,997 INFO L82 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2021-05-02 20:34:08,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:08,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002416074] [2021-05-02 20:34:08,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:09,015 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:09,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403664051] [2021-05-02 20:34:09,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:09,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:34:09,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:09,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:34:09,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:09,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002416074] [2021-05-02 20:34:09,308 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:09,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403664051] [2021-05-02 20:34:09,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403664051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:09,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:09,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:34:09,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63384514] [2021-05-02 20:34:09,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:34:09,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:09,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:34:09,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:34:09,311 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:34:09,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:09,483 INFO L93 Difference]: Finished difference Result 109 states and 145 transitions. [2021-05-02 20:34:09,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:34:09,483 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-05-02 20:34:09,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:09,485 INFO L225 Difference]: With dead ends: 109 [2021-05-02 20:34:09,485 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 20:34:09,485 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:34:09,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 20:34:09,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-05-02 20:34:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 20:34:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2021-05-02 20:34:09,494 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2021-05-02 20:34:09,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:09,494 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2021-05-02 20:34:09,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:34:09,495 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2021-05-02 20:34:09,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:34:09,496 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:09,496 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:09,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:34:09,721 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:09,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:09,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2021-05-02 20:34:09,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:09,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787761830] [2021-05-02 20:34:09,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:09,736 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:09,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834547408] [2021-05-02 20:34:09,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:09,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:34:09,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:09,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:34:09,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:09,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787761830] [2021-05-02 20:34:09,960 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:09,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834547408] [2021-05-02 20:34:09,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834547408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:09,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:09,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:34:09,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353903919] [2021-05-02 20:34:09,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:34:09,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:09,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:34:09,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:34:09,962 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:34:10,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:10,126 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2021-05-02 20:34:10,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:34:10,127 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-02 20:34:10,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:10,130 INFO L225 Difference]: With dead ends: 116 [2021-05-02 20:34:10,130 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 20:34:10,131 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:34:10,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 20:34:10,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-02 20:34:10,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.25) internal successors, (95), 77 states have internal predecessors, (95), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 20:34:10,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 155 transitions. [2021-05-02 20:34:10,142 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 155 transitions. Word has length 47 [2021-05-02 20:34:10,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:10,142 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 155 transitions. [2021-05-02 20:34:10,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:34:10,142 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 155 transitions. [2021-05-02 20:34:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:34:10,143 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:10,143 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:10,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:10,353 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:10,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:10,353 INFO L82 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2021-05-02 20:34:10,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:10,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340019089] [2021-05-02 20:34:10,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:10,366 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:10,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282920955] [2021-05-02 20:34:10,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:10,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 20:34:10,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:10,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:34:10,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:10,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340019089] [2021-05-02 20:34:10,666 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:10,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282920955] [2021-05-02 20:34:10,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282920955] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:10,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:10,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:34:10,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444331201] [2021-05-02 20:34:10,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:34:10,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:10,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:34:10,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:34:10,667 INFO L87 Difference]: Start difference. First operand 115 states and 155 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:34:10,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:10,909 INFO L93 Difference]: Finished difference Result 122 states and 161 transitions. [2021-05-02 20:34:10,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:34:10,909 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2021-05-02 20:34:10,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:10,913 INFO L225 Difference]: With dead ends: 122 [2021-05-02 20:34:10,913 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 20:34:10,913 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:34:10,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 20:34:10,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2021-05-02 20:34:10,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 79 states have (on average 1.240506329113924) internal successors, (98), 80 states have internal predecessors, (98), 31 states have call successors, (31), 9 states have call predecessors, (31), 8 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 20:34:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 158 transitions. [2021-05-02 20:34:10,929 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 158 transitions. Word has length 47 [2021-05-02 20:34:10,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:10,929 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 158 transitions. [2021-05-02 20:34:10,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:34:10,929 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 158 transitions. [2021-05-02 20:34:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:34:10,930 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:10,931 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:11,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:11,154 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:11,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:11,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2021-05-02 20:34:11,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:11,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352527088] [2021-05-02 20:34:11,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:11,167 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:11,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929645726] [2021-05-02 20:34:11,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:11,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:34:11,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:34:11,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:34:11,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:11,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:34:11,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:11,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352527088] [2021-05-02 20:34:11,356 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:11,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929645726] [2021-05-02 20:34:11,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929645726] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:11,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:11,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:34:11,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700370466] [2021-05-02 20:34:11,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:34:11,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:11,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:34:11,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:34:11,357 INFO L87 Difference]: Start difference. First operand 119 states and 158 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:34:11,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:11,424 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2021-05-02 20:34:11,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:34:11,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-05-02 20:34:11,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:11,427 INFO L225 Difference]: With dead ends: 130 [2021-05-02 20:34:11,427 INFO L226 Difference]: Without dead ends: 130 [2021-05-02 20:34:11,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:34:11,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-02 20:34:11,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2021-05-02 20:34:11,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 69 states have internal predecessors, (81), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 20:34:11,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2021-05-02 20:34:11,433 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 47 [2021-05-02 20:34:11,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:11,434 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2021-05-02 20:34:11,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:34:11,434 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2021-05-02 20:34:11,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 20:34:11,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:11,435 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:11,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:34:11,657 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:11,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:11,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2021-05-02 20:34:11,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:11,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589801415] [2021-05-02 20:34:11,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:11,667 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:11,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548555329] [2021-05-02 20:34:11,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:11,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:34:11,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:11,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-02 20:34:11,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:11,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589801415] [2021-05-02 20:34:11,823 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:11,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548555329] [2021-05-02 20:34:11,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548555329] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:11,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:11,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:34:11,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219203317] [2021-05-02 20:34:11,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:34:11,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:11,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:34:11,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:34:11,825 INFO L87 Difference]: Start difference. First operand 104 states and 133 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 20:34:11,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:11,905 INFO L93 Difference]: Finished difference Result 152 states and 209 transitions. [2021-05-02 20:34:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:34:11,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-05-02 20:34:11,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:11,907 INFO L225 Difference]: With dead ends: 152 [2021-05-02 20:34:11,907 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 20:34:11,907 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:34:11,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 20:34:11,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2021-05-02 20:34:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 82 states have internal predecessors, (89), 47 states have call successors, (47), 10 states have call predecessors, (47), 9 states have return successors, (45), 40 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 20:34:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 181 transitions. [2021-05-02 20:34:11,914 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 181 transitions. Word has length 52 [2021-05-02 20:34:11,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:11,914 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 181 transitions. [2021-05-02 20:34:11,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 20:34:11,915 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 181 transitions. [2021-05-02 20:34:11,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 20:34:11,915 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:11,916 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:12,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:12,129 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:12,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:12,129 INFO L82 PathProgramCache]: Analyzing trace with hash 846041443, now seen corresponding path program 1 times [2021-05-02 20:34:12,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:12,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288001929] [2021-05-02 20:34:12,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:12,141 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:12,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903956212] [2021-05-02 20:34:12,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:12,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:34:12,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:12,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:34:12,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:12,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288001929] [2021-05-02 20:34:12,367 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:12,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903956212] [2021-05-02 20:34:12,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903956212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:12,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:12,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:34:12,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791402600] [2021-05-02 20:34:12,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:34:12,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:12,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:34:12,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:34:12,371 INFO L87 Difference]: Start difference. First operand 133 states and 181 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:34:12,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:12,689 INFO L93 Difference]: Finished difference Result 183 states and 259 transitions. [2021-05-02 20:34:12,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:34:12,690 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 52 [2021-05-02 20:34:12,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:12,694 INFO L225 Difference]: With dead ends: 183 [2021-05-02 20:34:12,694 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 20:34:12,695 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 148.8ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:34:12,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 20:34:12,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 148. [2021-05-02 20:34:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 82 states have (on average 1.170731707317073) internal successors, (96), 89 states have internal predecessors, (96), 55 states have call successors, (55), 11 states have call predecessors, (55), 10 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-02 20:34:12,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 204 transitions. [2021-05-02 20:34:12,715 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 204 transitions. Word has length 52 [2021-05-02 20:34:12,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:12,716 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 204 transitions. [2021-05-02 20:34:12,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:34:12,717 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 204 transitions. [2021-05-02 20:34:12,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 20:34:12,718 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:12,718 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:12,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:12,942 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:12,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:12,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2021-05-02 20:34:12,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:12,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634304796] [2021-05-02 20:34:12,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:12,950 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:12,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845151807] [2021-05-02 20:34:12,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:13,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 20:34:13,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:13,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 20:34:13,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:13,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634304796] [2021-05-02 20:34:13,409 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:13,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845151807] [2021-05-02 20:34:13,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845151807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:13,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:13,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 20:34:13,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115366975] [2021-05-02 20:34:13,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 20:34:13,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:13,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 20:34:13,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:34:13,412 INFO L87 Difference]: Start difference. First operand 148 states and 204 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:34:13,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:13,995 INFO L93 Difference]: Finished difference Result 186 states and 251 transitions. [2021-05-02 20:34:13,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:34:13,996 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2021-05-02 20:34:13,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:13,997 INFO L225 Difference]: With dead ends: 186 [2021-05-02 20:34:13,997 INFO L226 Difference]: Without dead ends: 185 [2021-05-02 20:34:13,998 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 449.5ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-02 20:34:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-02 20:34:14,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2021-05-02 20:34:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 106 states have (on average 1.1603773584905661) internal successors, (123), 113 states have internal predecessors, (123), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-02 20:34:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 247 transitions. [2021-05-02 20:34:14,005 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 247 transitions. Word has length 64 [2021-05-02 20:34:14,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:14,006 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 247 transitions. [2021-05-02 20:34:14,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:34:14,006 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 247 transitions. [2021-05-02 20:34:14,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:34:14,007 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:14,007 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:14,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:34:14,221 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:14,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:14,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1523533001, now seen corresponding path program 2 times [2021-05-02 20:34:14,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:14,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229953182] [2021-05-02 20:34:14,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:14,229 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:14,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318268759] [2021-05-02 20:34:14,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:14,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:34:14,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:34:14,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 20:34:14,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:14,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 20:34:14,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:14,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229953182] [2021-05-02 20:34:14,434 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:14,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318268759] [2021-05-02 20:34:14,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318268759] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:14,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:14,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:34:14,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167351237] [2021-05-02 20:34:14,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:34:14,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:14,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:34:14,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:34:14,435 INFO L87 Difference]: Start difference. First operand 183 states and 247 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:34:14,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:14,733 INFO L93 Difference]: Finished difference Result 320 states and 476 transitions. [2021-05-02 20:34:14,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:34:14,734 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-05-02 20:34:14,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:14,737 INFO L225 Difference]: With dead ends: 320 [2021-05-02 20:34:14,737 INFO L226 Difference]: Without dead ends: 320 [2021-05-02 20:34:14,737 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:34:14,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-02 20:34:14,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 217. [2021-05-02 20:34:14,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 128 states have (on average 1.1953125) internal successors, (153), 134 states have internal predecessors, (153), 75 states have call successors, (75), 14 states have call predecessors, (75), 13 states have return successors, (73), 68 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 20:34:14,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 301 transitions. [2021-05-02 20:34:14,752 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 301 transitions. Word has length 69 [2021-05-02 20:34:14,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:14,752 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 301 transitions. [2021-05-02 20:34:14,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:34:14,752 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 301 transitions. [2021-05-02 20:34:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 20:34:14,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:14,753 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:14,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:34:14,979 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:14,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:14,979 INFO L82 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2021-05-02 20:34:14,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:14,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282251427] [2021-05-02 20:34:14,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:14,988 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:14,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1426580497] [2021-05-02 20:34:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:15,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 20:34:15,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:15,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 20:34:15,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:15,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282251427] [2021-05-02 20:34:15,229 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:15,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426580497] [2021-05-02 20:34:15,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426580497] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:15,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:15,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:34:15,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806102523] [2021-05-02 20:34:15,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:34:15,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:15,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:34:15,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:34:15,231 INFO L87 Difference]: Start difference. First operand 217 states and 301 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 20:34:15,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:15,412 INFO L93 Difference]: Finished difference Result 246 states and 341 transitions. [2021-05-02 20:34:15,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:34:15,421 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2021-05-02 20:34:15,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:15,423 INFO L225 Difference]: With dead ends: 246 [2021-05-02 20:34:15,423 INFO L226 Difference]: Without dead ends: 246 [2021-05-02 20:34:15,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:34:15,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-02 20:34:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2021-05-02 20:34:15,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 144 states have internal predecessors, (163), 83 states have call successors, (83), 16 states have call predecessors, (83), 15 states have return successors, (81), 75 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-02 20:34:15,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 327 transitions. [2021-05-02 20:34:15,437 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 327 transitions. Word has length 74 [2021-05-02 20:34:15,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:15,438 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 327 transitions. [2021-05-02 20:34:15,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 20:34:15,438 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 327 transitions. [2021-05-02 20:34:15,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 20:34:15,439 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:15,439 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:15,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:34:15,662 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:15,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:15,663 INFO L82 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2021-05-02 20:34:15,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:15,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894923237] [2021-05-02 20:34:15,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:15,670 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:15,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093721483] [2021-05-02 20:34:15,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:15,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:34:15,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:15,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:15,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:16,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:16,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:16,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:16,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:16,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 20:34:16,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:16,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894923237] [2021-05-02 20:34:16,226 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:16,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093721483] [2021-05-02 20:34:16,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093721483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:16,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:16,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:34:16,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657178631] [2021-05-02 20:34:16,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:34:16,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:16,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:34:16,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:34:16,227 INFO L87 Difference]: Start difference. First operand 236 states and 327 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:34:17,417 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-02 20:34:17,670 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-02 20:34:18,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:18,809 INFO L93 Difference]: Finished difference Result 369 states and 532 transitions. [2021-05-02 20:34:18,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 20:34:18,810 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 72 [2021-05-02 20:34:18,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:18,812 INFO L225 Difference]: With dead ends: 369 [2021-05-02 20:34:18,812 INFO L226 Difference]: Without dead ends: 369 [2021-05-02 20:34:18,813 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1634.2ms TimeCoverageRelationStatistics Valid=417, Invalid=1935, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 20:34:18,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-02 20:34:18,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 345. [2021-05-02 20:34:18,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 196 states have (on average 1.2142857142857142) internal successors, (238), 208 states have internal predecessors, (238), 131 states have call successors, (131), 18 states have call predecessors, (131), 17 states have return successors, (129), 118 states have call predecessors, (129), 129 states have call successors, (129) [2021-05-02 20:34:18,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 498 transitions. [2021-05-02 20:34:18,826 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 498 transitions. Word has length 72 [2021-05-02 20:34:18,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:18,826 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 498 transitions. [2021-05-02 20:34:18,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:34:18,826 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 498 transitions. [2021-05-02 20:34:18,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 20:34:18,828 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:18,828 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:19,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:19,045 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:19,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:19,045 INFO L82 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2021-05-02 20:34:19,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:19,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029637826] [2021-05-02 20:34:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:19,051 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:19,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493382040] [2021-05-02 20:34:19,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:19,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:34:19,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:34:19,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 20:34:19,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:19,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 20:34:19,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:19,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029637826] [2021-05-02 20:34:19,259 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:19,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493382040] [2021-05-02 20:34:19,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493382040] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:19,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:19,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:34:19,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462634805] [2021-05-02 20:34:19,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:34:19,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:19,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:34:19,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:34:19,261 INFO L87 Difference]: Start difference. First operand 345 states and 498 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 20:34:19,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:19,302 INFO L93 Difference]: Finished difference Result 326 states and 449 transitions. [2021-05-02 20:34:19,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:34:19,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2021-05-02 20:34:19,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:19,305 INFO L225 Difference]: With dead ends: 326 [2021-05-02 20:34:19,305 INFO L226 Difference]: Without dead ends: 326 [2021-05-02 20:34:19,305 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:34:19,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-02 20:34:19,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 299. [2021-05-02 20:34:19,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 175 states have (on average 1.2) internal successors, (210), 178 states have internal predecessors, (210), 107 states have call successors, (107), 17 states have call predecessors, (107), 16 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-05-02 20:34:19,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 422 transitions. [2021-05-02 20:34:19,317 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 422 transitions. Word has length 77 [2021-05-02 20:34:19,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:19,317 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 422 transitions. [2021-05-02 20:34:19,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 20:34:19,317 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 422 transitions. [2021-05-02 20:34:19,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 20:34:19,319 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:19,319 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:19,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:34:19,542 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:19,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:19,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1813106047, now seen corresponding path program 3 times [2021-05-02 20:34:19,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:19,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606415857] [2021-05-02 20:34:19,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:19,563 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:19,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406057844] [2021-05-02 20:34:19,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:19,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:34:19,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:34:19,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 20:34:19,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:19,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-05-02 20:34:19,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:19,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606415857] [2021-05-02 20:34:19,759 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:19,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406057844] [2021-05-02 20:34:19,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406057844] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:19,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:19,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 20:34:19,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928849058] [2021-05-02 20:34:19,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:34:19,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:19,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:34:19,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:34:19,762 INFO L87 Difference]: Start difference. First operand 299 states and 422 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 20:34:19,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:19,841 INFO L93 Difference]: Finished difference Result 340 states and 487 transitions. [2021-05-02 20:34:19,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:34:19,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2021-05-02 20:34:19,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:19,843 INFO L225 Difference]: With dead ends: 340 [2021-05-02 20:34:19,843 INFO L226 Difference]: Without dead ends: 340 [2021-05-02 20:34:19,844 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:34:19,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-02 20:34:19,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 333. [2021-05-02 20:34:19,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 188 states have (on average 1.2127659574468086) internal successors, (228), 191 states have internal predecessors, (228), 127 states have call successors, (127), 18 states have call predecessors, (127), 17 states have return successors, (125), 123 states have call predecessors, (125), 125 states have call successors, (125) [2021-05-02 20:34:19,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 480 transitions. [2021-05-02 20:34:19,855 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 480 transitions. Word has length 77 [2021-05-02 20:34:19,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:19,855 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 480 transitions. [2021-05-02 20:34:19,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 20:34:19,855 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 480 transitions. [2021-05-02 20:34:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 20:34:19,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:19,856 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:20,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:34:20,069 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:20,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:20,069 INFO L82 PathProgramCache]: Analyzing trace with hash -747783847, now seen corresponding path program 1 times [2021-05-02 20:34:20,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:20,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562999548] [2021-05-02 20:34:20,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:20,076 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:20,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608272910] [2021-05-02 20:34:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:20,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:34:20,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:20,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 20:34:20,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:20,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562999548] [2021-05-02 20:34:20,371 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:20,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608272910] [2021-05-02 20:34:20,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608272910] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:20,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:20,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:34:20,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267376654] [2021-05-02 20:34:20,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:34:20,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:20,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:34:20,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:34:20,374 INFO L87 Difference]: Start difference. First operand 333 states and 480 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:34:20,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:20,742 INFO L93 Difference]: Finished difference Result 440 states and 639 transitions. [2021-05-02 20:34:20,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:34:20,743 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2021-05-02 20:34:20,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:20,747 INFO L225 Difference]: With dead ends: 440 [2021-05-02 20:34:20,747 INFO L226 Difference]: Without dead ends: 440 [2021-05-02 20:34:20,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 191.0ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-05-02 20:34:20,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-05-02 20:34:20,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 351. [2021-05-02 20:34:20,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 196 states have (on average 1.2040816326530612) internal successors, (236), 201 states have internal predecessors, (236), 135 states have call successors, (135), 20 states have call predecessors, (135), 19 states have return successors, (133), 129 states have call predecessors, (133), 133 states have call successors, (133) [2021-05-02 20:34:20,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 504 transitions. [2021-05-02 20:34:20,761 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 504 transitions. Word has length 79 [2021-05-02 20:34:20,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:20,762 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 504 transitions. [2021-05-02 20:34:20,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:34:20,762 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 504 transitions. [2021-05-02 20:34:20,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 20:34:20,762 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:20,763 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:20,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:34:20,977 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:20,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:20,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 4 times [2021-05-02 20:34:20,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:20,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245516723] [2021-05-02 20:34:20,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:20,984 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:20,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061482779] [2021-05-02 20:34:20,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:21,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:34:21,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:34:21,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 87 conjunts are in the unsatisfiable core [2021-05-02 20:34:21,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:21,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:21,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245516723] [2021-05-02 20:34:21,843 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:21,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061482779] [2021-05-02 20:34:21,843 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-02 20:34:22,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:34:22,066 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Infinite/NaN value at de.uni_freiburg.informatik.ultimate.logic.Theory.constant(Theory.java:446) at de.uni_freiburg.informatik.ultimate.logic.Rational.toTerm(Rational.java:921) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.div(SmtUtils.java:1578) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termWithLocalSimplification(SmtUtils.java:1391) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termWithLocalSimplification(SmtUtils.java:1321) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.convertApplicationTerm(SmtUtils.java:1310) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SubstitutionWithLocalSimplification.convertApplicationTerm(SubstitutionWithLocalSimplification.java:49) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:339) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.doSubstitutions(DualJunctionDer.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperSbr.applyReplacement(DualJunctionDer.java:386) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:333) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:231) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:149) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:127) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:869) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:835) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:753) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:384) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:465) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:612) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-02 20:34:22,071 INFO L168 Benchmark]: Toolchain (without parser) took 17062.29 ms. Allocated memory was 204.5 MB in the beginning and 354.4 MB in the end (delta: 149.9 MB). Free memory was 169.7 MB in the beginning and 256.8 MB in the end (delta: -87.1 MB). Peak memory consumption was 64.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:22,071 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 204.5 MB. Free memory is still 186.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:34:22,071 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.04 ms. Allocated memory is still 204.5 MB. Free memory was 169.5 MB in the beginning and 187.7 MB in the end (delta: -18.2 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:22,071 INFO L168 Benchmark]: Boogie Preprocessor took 44.78 ms. Allocated memory is still 204.5 MB. Free memory was 187.7 MB in the beginning and 186.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:22,071 INFO L168 Benchmark]: RCFGBuilder took 428.42 ms. Allocated memory is still 204.5 MB. Free memory was 185.9 MB in the beginning and 169.1 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:22,071 INFO L168 Benchmark]: IcfgTransformer took 19.07 ms. Allocated memory is still 204.5 MB. Free memory was 169.1 MB in the beginning and 167.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:22,071 INFO L168 Benchmark]: TraceAbstraction took 16315.94 ms. Allocated memory was 204.5 MB in the beginning and 354.4 MB in the end (delta: 149.9 MB). Free memory was 167.4 MB in the beginning and 256.8 MB in the end (delta: -89.4 MB). Peak memory consumption was 61.9 MB. Max. memory is 8.0 GB. [2021-05-02 20:34:22,072 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 204.5 MB. Free memory is still 186.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 237.04 ms. Allocated memory is still 204.5 MB. Free memory was 169.5 MB in the beginning and 187.7 MB in the end (delta: -18.2 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.78 ms. Allocated memory is still 204.5 MB. Free memory was 187.7 MB in the beginning and 186.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 428.42 ms. Allocated memory is still 204.5 MB. Free memory was 185.9 MB in the beginning and 169.1 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 19.07 ms. Allocated memory is still 204.5 MB. Free memory was 169.1 MB in the beginning and 167.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16315.94 ms. Allocated memory was 204.5 MB in the beginning and 354.4 MB in the end (delta: 149.9 MB). Free memory was 167.4 MB in the beginning and 256.8 MB in the end (delta: -89.4 MB). Peak memory consumption was 61.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Infinite/NaN value de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Infinite/NaN value: de.uni_freiburg.informatik.ultimate.logic.Theory.constant(Theory.java:446) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...