/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/fermat1-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:16:43,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:16:43,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:16:43,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:16:43,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:16:43,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:16:43,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:16:43,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:16:43,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:16:43,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:16:43,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:16:43,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:16:43,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:16:43,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:16:43,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:16:43,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:16:43,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:16:43,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:16:43,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:16:43,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:16:43,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:16:43,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:16:43,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:16:43,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:16:43,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:16:43,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:16:43,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:16:43,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:16:43,545 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:16:43,558 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:16:43,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:16:43,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:16:43,560 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:16:43,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:16:43,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:16:43,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:16:43,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:16:43,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:16:43,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:16:43,562 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:16:43,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:16:43,562 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:16:43,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:16:43,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:16:43,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:16:43,562 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:16:43,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:16:43,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:16:43,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:16:43,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:16:43,563 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:16:43,564 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:16:43,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:16:43,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:16:43,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:16:43,818 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:16:43,819 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:16:43,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/fermat1-ll.c [2021-05-02 19:16:43,869 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3e70d87c/069f191cacdb432aaba20ca0b8706de6/FLAG8127a1d12 [2021-05-02 19:16:44,216 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:16:44,217 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/fermat1-ll.c [2021-05-02 19:16:44,222 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3e70d87c/069f191cacdb432aaba20ca0b8706de6/FLAG8127a1d12 [2021-05-02 19:16:44,633 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3e70d87c/069f191cacdb432aaba20ca0b8706de6 [2021-05-02 19:16:44,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:16:44,636 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:16:44,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:16:44,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:16:44,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:16:44,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:16:44" (1/1) ... [2021-05-02 19:16:44,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2baf123a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:44, skipping insertion in model container [2021-05-02 19:16:44,645 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:16:44" (1/1) ... [2021-05-02 19:16:44,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:16:44,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:16:44,776 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/fermat1-ll.c[535,548] [2021-05-02 19:16:44,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:16:44,809 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:16:44,853 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/fermat1-ll.c[535,548] [2021-05-02 19:16:44,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:16:44,868 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:16:44,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:44 WrapperNode [2021-05-02 19:16:44,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:16:44,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:16:44,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:16:44,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:16:44,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:44" (1/1) ... [2021-05-02 19:16:44,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:44" (1/1) ... [2021-05-02 19:16:44,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:44" (1/1) ... [2021-05-02 19:16:44,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:44" (1/1) ... [2021-05-02 19:16:44,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:44" (1/1) ... [2021-05-02 19:16:44,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:44" (1/1) ... [2021-05-02 19:16:44,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:44" (1/1) ... [2021-05-02 19:16:44,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:16:44,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:16:44,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:16:44,914 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:16:44,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:16:44,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:16:44,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:16:44,984 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:16:44,984 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:16:44,985 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:16:44,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:16:44,985 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:16:44,985 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:16:44,985 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:16:44,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:16:44,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:16:44,986 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:16:44,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:16:44,986 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:16:44,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:16:44,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:16:44,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:16:44,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:16:44,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:16:44,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:16:45,224 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:16:45,225 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 19:16:45,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:16:45 BoogieIcfgContainer [2021-05-02 19:16:45,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:16:45,226 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:16:45,226 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:16:45,227 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:16:45,229 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:16:45" (1/1) ... [2021-05-02 19:16:45,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:16:45 BasicIcfg [2021-05-02 19:16:45,241 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:16:45,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:16:45,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:16:45,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:16:45,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:16:44" (1/4) ... [2021-05-02 19:16:45,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd024a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:16:45, skipping insertion in model container [2021-05-02 19:16:45,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:44" (2/4) ... [2021-05-02 19:16:45,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd024a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:16:45, skipping insertion in model container [2021-05-02 19:16:45,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:16:45" (3/4) ... [2021-05-02 19:16:45,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd024a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:16:45, skipping insertion in model container [2021-05-02 19:16:45,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:16:45" (4/4) ... [2021-05-02 19:16:45,246 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll.cJordan [2021-05-02 19:16:45,249 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:16:45,252 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:16:45,267 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:16:45,282 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:16:45,282 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:16:45,282 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:16:45,282 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:16:45,282 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:16:45,282 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:16:45,283 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:16:45,283 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:16:45,295 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 19:16:45,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:16:45,304 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:45,304 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:45,304 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:45,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:45,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2097858634, now seen corresponding path program 1 times [2021-05-02 19:16:45,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:45,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131597403] [2021-05-02 19:16:45,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:45,381 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:45,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018311445] [2021-05-02 19:16:45,382 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 19:16:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:45,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 19:16:45,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 19:16:45,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:45,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131597403] [2021-05-02 19:16:45,554 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:45,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018311445] [2021-05-02 19:16:45,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018311445] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:16:45,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:16:45,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 19:16:45,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032715687] [2021-05-02 19:16:45,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 19:16:45,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:45,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 19:16:45,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 19:16:45,568 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:16:45,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:45,581 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-02 19:16:45,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 19:16:45,582 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 19:16:45,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:45,587 INFO L225 Difference]: With dead ends: 34 [2021-05-02 19:16:45,587 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 19:16:45,588 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 19:16:45,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 19:16:45,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 19:16:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 19:16:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-02 19:16:45,610 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 22 [2021-05-02 19:16:45,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:45,610 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-02 19:16:45,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:16:45,610 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-02 19:16:45,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:16:45,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:45,611 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:45,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 19:16:45,817 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:45,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:45,817 INFO L82 PathProgramCache]: Analyzing trace with hash -114027593, now seen corresponding path program 1 times [2021-05-02 19:16:45,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:45,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360953892] [2021-05-02 19:16:45,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:45,831 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:45,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745681902] [2021-05-02 19:16:45,831 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 19:16:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:45,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 19:16:45,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:46,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:46,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:46,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:46,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:16:46,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:46,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360953892] [2021-05-02 19:16:46,192 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:46,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745681902] [2021-05-02 19:16:46,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745681902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:46,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:46,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:16:46,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292006718] [2021-05-02 19:16:46,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:16:46,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:46,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:16:46,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:16:46,194 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:16:52,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:52,451 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-05-02 19:16:52,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:16:52,452 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 19:16:52,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:52,453 INFO L225 Difference]: With dead ends: 43 [2021-05-02 19:16:52,453 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 19:16:52,454 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:16:52,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 19:16:52,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-05-02 19:16:52,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 19:16:52,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2021-05-02 19:16:52,459 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 22 [2021-05-02 19:16:52,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:52,459 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2021-05-02 19:16:52,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:16:52,460 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2021-05-02 19:16:52,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 19:16:52,460 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:52,460 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:52,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:52,665 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:52,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:52,666 INFO L82 PathProgramCache]: Analyzing trace with hash -85063256, now seen corresponding path program 1 times [2021-05-02 19:16:52,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:52,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970746484] [2021-05-02 19:16:52,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:52,674 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:52,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810308945] [2021-05-02 19:16:52,675 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 19:16:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:52,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 19:16:52,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:52,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:16:53,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:53,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970746484] [2021-05-02 19:16:53,009 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:53,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810308945] [2021-05-02 19:16:53,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810308945] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:53,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:53,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:16:53,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513526919] [2021-05-02 19:16:53,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:16:53,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:53,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:16:53,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:16:53,011 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:16:59,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:59,553 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2021-05-02 19:16:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:16:59,554 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 19:16:59,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:59,556 INFO L225 Difference]: With dead ends: 56 [2021-05-02 19:16:59,556 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 19:16:59,556 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 198.5ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:16:59,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 19:16:59,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2021-05-02 19:16:59,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:16:59,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-05-02 19:16:59,561 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 28 [2021-05-02 19:16:59,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:59,561 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-05-02 19:16:59,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:16:59,562 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-05-02 19:16:59,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 19:16:59,562 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:59,562 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 19:16:59,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:59,778 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:59,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:59,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1595128824, now seen corresponding path program 1 times [2021-05-02 19:16:59,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:59,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639662675] [2021-05-02 19:16:59,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:59,788 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:59,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203645829] [2021-05-02 19:16:59,788 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 19:16:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:59,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 19:16:59,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:59,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:59,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:00,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:00,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:00,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:00,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:00,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:00,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:00,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:00,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:00,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:00,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:00,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:00,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:00,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:00,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:00,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:00,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:00,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 19:17:00,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:17:00,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639662675] [2021-05-02 19:17:00,134 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:17:00,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203645829] [2021-05-02 19:17:00,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203645829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:17:00,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:17:00,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:17:00,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247570406] [2021-05-02 19:17:00,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:17:00,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:17:00,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:17:00,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:17:00,135 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 19:17:20,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:17:20,014 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2021-05-02 19:17:20,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 19:17:20,014 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 19:17:20,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:17:20,015 INFO L225 Difference]: With dead ends: 88 [2021-05-02 19:17:20,016 INFO L226 Difference]: Without dead ends: 88 [2021-05-02 19:17:20,016 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 159.4ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:17:20,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-02 19:17:20,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-05-02 19:17:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 62 states have internal predecessors, (66), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (21), 16 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:17:20,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2021-05-02 19:17:20,024 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 36 [2021-05-02 19:17:20,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:17:20,024 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2021-05-02 19:17:20,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 19:17:20,025 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2021-05-02 19:17:20,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 19:17:20,025 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:17:20,025 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 19:17:20,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:17:20,229 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:17:20,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:17:20,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1837167852, now seen corresponding path program 1 times [2021-05-02 19:17:20,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:17:20,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367560117] [2021-05-02 19:17:20,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:17:20,237 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:17:20,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801295573] [2021-05-02 19:17:20,238 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 19:17:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:17:20,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 19:17:20,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:17:20,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:20,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:20,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:20,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:20,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:20,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:20,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:20,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:53,697 WARN L205 SmtUtils]: Spent 31.28 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 19:17:53,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:17:53,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:10,037 WARN L205 SmtUtils]: Spent 6.07 s on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 19:18:10,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:10,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 7 refuted. 2 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 19:18:10,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:18:10,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367560117] [2021-05-02 19:18:10,094 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:18:10,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801295573] [2021-05-02 19:18:10,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801295573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:18:10,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:18:10,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:18:10,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076375391] [2021-05-02 19:18:10,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:18:10,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:18:10,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:18:10,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=104, Unknown=5, NotChecked=0, Total=132 [2021-05-02 19:18:10,095 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 19:18:56,563 WARN L205 SmtUtils]: Spent 13.66 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 19:19:44,224 WARN L205 SmtUtils]: Spent 6.04 s on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 19:20:11,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:20:11,493 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2021-05-02 19:20:11,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 19:20:11,494 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2021-05-02 19:20:11,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:20:11,495 INFO L225 Difference]: With dead ends: 111 [2021-05-02 19:20:11,495 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 19:20:11,495 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 108440.9ms TimeCoverageRelationStatistics Valid=52, Invalid=239, Unknown=15, NotChecked=0, Total=306 [2021-05-02 19:20:11,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 19:20:11,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-02 19:20:11,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 79 states have internal predecessors, (84), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (25), 19 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 19:20:11,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 135 transitions. [2021-05-02 19:20:11,502 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 135 transitions. Word has length 43 [2021-05-02 19:20:11,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:20:11,502 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 135 transitions. [2021-05-02 19:20:11,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 19:20:11,502 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 135 transitions. [2021-05-02 19:20:11,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 19:20:11,503 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:20:11,503 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:20:11,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:20:11,709 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:20:11,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:20:11,709 INFO L82 PathProgramCache]: Analyzing trace with hash -2058448714, now seen corresponding path program 2 times [2021-05-02 19:20:11,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:20:11,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916075600] [2021-05-02 19:20:11,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:20:11,716 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:20:11,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735868523] [2021-05-02 19:20:11,717 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 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 19:20:11,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:20:11,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:20:11,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 19:20:11,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:20:11,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:11,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:12,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:12,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:12,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:12,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:12,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:12,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:12,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:12,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:12,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:12,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:12,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:12,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:12,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:12,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:12,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:12,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:12,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:12,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:12,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:15,143 WARN L205 SmtUtils]: Spent 2.98 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 19:20:15,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:15,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:15,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:15,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:15,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:15,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:15,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:15,266 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 19:20:15,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:20:15,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916075600] [2021-05-02 19:20:15,266 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:20:15,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735868523] [2021-05-02 19:20:15,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735868523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:20:15,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:20:15,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 19:20:15,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442994500] [2021-05-02 19:20:15,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 19:20:15,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:20:15,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 19:20:15,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:20:15,268 INFO L87 Difference]: Start difference. First operand 111 states and 135 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 19:20:20,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:20:20,687 INFO L93 Difference]: Finished difference Result 168 states and 204 transitions. [2021-05-02 19:20:20,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 19:20:20,688 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2021-05-02 19:20:20,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:20:20,693 INFO L225 Difference]: With dead ends: 168 [2021-05-02 19:20:20,693 INFO L226 Difference]: Without dead ends: 168 [2021-05-02 19:20:20,694 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 3273.2ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 19:20:20,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-02 19:20:20,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 157. [2021-05-02 19:20:20,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 105 states have (on average 1.1428571428571428) internal successors, (120), 113 states have internal predecessors, (120), 34 states have call successors, (34), 18 states have call predecessors, (34), 17 states have return successors, (33), 25 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 19:20:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 187 transitions. [2021-05-02 19:20:20,703 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 187 transitions. Word has length 43 [2021-05-02 19:20:20,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:20:20,704 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 187 transitions. [2021-05-02 19:20:20,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 19:20:20,704 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 187 transitions. [2021-05-02 19:20:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 19:20:20,705 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:20:20,705 INFO L523 BasicCegarLoop]: trace histogram [5, 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] [2021-05-02 19:20:20,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:20:20,909 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:20:20,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:20:20,909 INFO L82 PathProgramCache]: Analyzing trace with hash 747696654, now seen corresponding path program 2 times [2021-05-02 19:20:20,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:20:20,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102447911] [2021-05-02 19:20:20,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:20:20,917 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:20:20,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947152188] [2021-05-02 19:20:20,917 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 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 19:20:20,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:20:20,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:20:20,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 19:20:20,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:20:21,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:21,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:21,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:21,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:33,659 WARN L205 SmtUtils]: Spent 10.56 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 19:20:33,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:33,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:33,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:33,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:47,753 WARN L205 SmtUtils]: Spent 6.64 s on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 19:20:47,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:47,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:17,662 WARN L205 SmtUtils]: Spent 6.04 s on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 19:21:17,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:17,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:21:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 11 refuted. 7 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 19:21:17,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:21:17,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102447911] [2021-05-02 19:21:17,714 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:21:17,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947152188] [2021-05-02 19:21:17,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947152188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:21:17,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:21:17,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 19:21:17,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598694098] [2021-05-02 19:21:17,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 19:21:17,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:21:17,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 19:21:17,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=121, Unknown=10, NotChecked=0, Total=156 [2021-05-02 19:21:17,716 INFO L87 Difference]: Start difference. First operand 157 states and 187 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 19:22:00,797 WARN L205 SmtUtils]: Spent 8.06 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 19:22:49,197 WARN L205 SmtUtils]: Spent 6.09 s on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 19:23:38,071 WARN L205 SmtUtils]: Spent 6.91 s on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 19:25:12,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:25:12,292 INFO L93 Difference]: Finished difference Result 180 states and 213 transitions. [2021-05-02 19:25:12,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 19:25:12,293 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 50 [2021-05-02 19:25:12,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:25:12,294 INFO L225 Difference]: With dead ends: 180 [2021-05-02 19:25:12,295 INFO L226 Difference]: Without dead ends: 180 [2021-05-02 19:25:12,295 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 132825.5ms TimeCoverageRelationStatistics Valid=58, Invalid=294, Unknown=28, NotChecked=0, Total=380 [2021-05-02 19:25:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-02 19:25:12,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2021-05-02 19:25:12,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 121 states have (on average 1.140495867768595) internal successors, (138), 130 states have internal predecessors, (138), 38 states have call successors, (38), 21 states have call predecessors, (38), 20 states have return successors, (37), 28 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-02 19:25:12,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 213 transitions. [2021-05-02 19:25:12,303 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 213 transitions. Word has length 50 [2021-05-02 19:25:12,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:25:12,303 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 213 transitions. [2021-05-02 19:25:12,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 19:25:12,303 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 213 transitions. [2021-05-02 19:25:12,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 19:25:12,304 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:25:12,310 INFO L523 BasicCegarLoop]: trace histogram [5, 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] [2021-05-02 19:25:12,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:25:12,510 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:25:12,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:25:12,511 INFO L82 PathProgramCache]: Analyzing trace with hash -801390938, now seen corresponding path program 1 times [2021-05-02 19:25:12,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:25:12,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528474644] [2021-05-02 19:25:12,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:25:12,519 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:25:12,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462264103] [2021-05-02 19:25:12,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:25:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:25:12,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 19:25:12,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:25:12,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:12,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:12,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:12,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:12,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:12,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:12,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:12,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:12,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:12,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:12,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:12,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 19:25:12,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:25:12,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528474644] [2021-05-02 19:25:12,714 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:25:12,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462264103] [2021-05-02 19:25:12,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462264103] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:25:12,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:25:12,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-05-02 19:25:12,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321766626] [2021-05-02 19:25:12,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 19:25:12,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:25:12,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 19:25:12,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:25:12,716 INFO L87 Difference]: Start difference. First operand 180 states and 213 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:25:12,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:25:12,760 INFO L93 Difference]: Finished difference Result 195 states and 232 transitions. [2021-05-02 19:25:12,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 19:25:12,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2021-05-02 19:25:12,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:25:12,762 INFO L225 Difference]: With dead ends: 195 [2021-05-02 19:25:12,762 INFO L226 Difference]: Without dead ends: 195 [2021-05-02 19:25:12,763 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:25:12,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-02 19:25:12,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 178. [2021-05-02 19:25:12,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 121 states have (on average 1.140495867768595) internal successors, (138), 124 states have internal predecessors, (138), 38 states have call successors, (38), 19 states have call predecessors, (38), 18 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-02 19:25:12,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 213 transitions. [2021-05-02 19:25:12,771 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 213 transitions. Word has length 50 [2021-05-02 19:25:12,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:25:12,771 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 213 transitions. [2021-05-02 19:25:12,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:25:12,771 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 213 transitions. [2021-05-02 19:25:12,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 19:25:12,772 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:25:12,772 INFO L523 BasicCegarLoop]: trace histogram [5, 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] [2021-05-02 19:25:12,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 19:25:12,988 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:25:12,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:25:12,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1022671800, now seen corresponding path program 3 times [2021-05-02 19:25:12,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:25:12,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804975479] [2021-05-02 19:25:12,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:25:12,994 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:25:12,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62456774] [2021-05-02 19:25:12,995 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 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 19:25:13,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 19:25:13,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:25:13,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 19:25:13,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:25:13,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-05-02 19:25:13,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:25:13,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804975479] [2021-05-02 19:25:13,396 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:25:13,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62456774] [2021-05-02 19:25:13,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62456774] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:25:13,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:25:13,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:25:13,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476165523] [2021-05-02 19:25:13,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:25:13,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:25:13,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:25:13,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:25:13,397 INFO L87 Difference]: Start difference. First operand 178 states and 213 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 19:25:22,813 WARN L205 SmtUtils]: Spent 6.06 s on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-05-02 19:25:31,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:25:31,061 INFO L93 Difference]: Finished difference Result 201 states and 242 transitions. [2021-05-02 19:25:31,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:25:31,062 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 50 [2021-05-02 19:25:31,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:25:31,063 INFO L225 Difference]: With dead ends: 201 [2021-05-02 19:25:31,063 INFO L226 Difference]: Without dead ends: 201 [2021-05-02 19:25:31,063 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 6201.3ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:25:31,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-02 19:25:31,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 178. [2021-05-02 19:25:31,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 121 states have (on average 1.140495867768595) internal successors, (138), 124 states have internal predecessors, (138), 38 states have call successors, (38), 19 states have call predecessors, (38), 18 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-02 19:25:31,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 213 transitions. [2021-05-02 19:25:31,079 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 213 transitions. Word has length 50 [2021-05-02 19:25:31,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:25:31,080 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 213 transitions. [2021-05-02 19:25:31,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 19:25:31,080 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 213 transitions. [2021-05-02 19:25:31,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 19:25:31,085 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:25:31,085 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2021-05-02 19:25:31,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:25:31,286 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:25:31,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:25:31,286 INFO L82 PathProgramCache]: Analyzing trace with hash 227941844, now seen corresponding path program 3 times [2021-05-02 19:25:31,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:25:31,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209111368] [2021-05-02 19:25:31,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:25:31,292 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:25:31,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099526620] [2021-05-02 19:25:31,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:25:31,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 19:25:31,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:25:31,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 19:25:31,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:25:31,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:31,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:31,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:31,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:31,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:31,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:31,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:31,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:31,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:31,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:31,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:31,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:31,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:31,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:31,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:31,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:25:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-05-02 19:25:31,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:25:31,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209111368] [2021-05-02 19:25:31,597 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:25:31,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099526620] [2021-05-02 19:25:31,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099526620] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:25:31,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:25:31,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:25:31,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219290203] [2021-05-02 19:25:31,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:25:31,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:25:31,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:25:31,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:25:31,598 INFO L87 Difference]: Start difference. First operand 178 states and 213 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 19:25:38,318 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-05-02 19:26:12,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:26:12,956 INFO L93 Difference]: Finished difference Result 182 states and 216 transitions. [2021-05-02 19:26:12,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:26:12,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 57 [2021-05-02 19:26:12,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:26:12,957 INFO L225 Difference]: With dead ends: 182 [2021-05-02 19:26:12,957 INFO L226 Difference]: Without dead ends: 182 [2021-05-02 19:26:12,958 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 278.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:26:12,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-02 19:26:12,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-05-02 19:26:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 127 states have internal predecessors, (141), 38 states have call successors, (38), 20 states have call predecessors, (38), 19 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-02 19:26:12,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2021-05-02 19:26:12,962 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 57 [2021-05-02 19:26:12,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:26:12,962 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2021-05-02 19:26:12,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 19:26:12,963 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2021-05-02 19:26:12,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 19:26:12,963 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:26:12,963 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 3, 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] [2021-05-02 19:26:13,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:26:13,177 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:26:13,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:26:13,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1256405151, now seen corresponding path program 1 times [2021-05-02 19:26:13,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:26:13,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712514195] [2021-05-02 19:26:13,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:26:13,184 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:26:13,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85265425] [2021-05-02 19:26:13,184 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 19:26:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:26:13,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 19:26:13,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:26:13,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:13,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:16,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:26:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 27 refuted. 4 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-02 19:26:17,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:26:17,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712514195] [2021-05-02 19:26:17,215 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:26:17,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85265425] [2021-05-02 19:26:17,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85265425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:26:17,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:26:17,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 19:26:17,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472728101] [2021-05-02 19:26:17,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 19:26:17,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:26:17,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 19:26:17,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=154, Unknown=1, NotChecked=0, Total=182 [2021-05-02 19:26:17,216 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10)