/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:43:50,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:43:50,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:43:50,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:43:50,291 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:43:50,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:43:50,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:43:50,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:43:50,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:43:50,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:43:50,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:43:50,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:43:50,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:43:50,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:43:50,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:43:50,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:43:50,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:43:50,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:43:50,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:43:50,328 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:43:50,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:43:50,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:43:50,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:43:50,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:43:50,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:43:50,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:43:50,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:43:50,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:43:50,352 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:43:50,370 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:43:50,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:43:50,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:43:50,373 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:43:50,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:43:50,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:43:50,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:43:50,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:43:50,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:43:50,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:43:50,374 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:43:50,375 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:43:50,375 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:43:50,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:43:50,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:43:50,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:43:50,375 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:43:50,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:43:50,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:43:50,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:43:50,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:43:50,377 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:43:50,377 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:43:50,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:43:50,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:43:50,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:43:50,664 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:43:50,664 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:43:50,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound5.c [2021-05-02 20:43:50,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c537daeb/b87320f8178a4e90ab1fb642f65b99e4/FLAG7e7507933 [2021-05-02 20:43:51,162 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:43:51,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound5.c [2021-05-02 20:43:51,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c537daeb/b87320f8178a4e90ab1fb642f65b99e4/FLAG7e7507933 [2021-05-02 20:43:51,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c537daeb/b87320f8178a4e90ab1fb642f65b99e4 [2021-05-02 20:43:51,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:43:51,190 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:43:51,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:43:51,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:43:51,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:43:51,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:43:51" (1/1) ... [2021-05-02 20:43:51,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e833465 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:43:51, skipping insertion in model container [2021-05-02 20:43:51,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:43:51" (1/1) ... [2021-05-02 20:43:51,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:43:51,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:43:51,308 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound5.c[524,537] [2021-05-02 20:43:51,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:43:51,327 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:43:51,338 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound5.c[524,537] [2021-05-02 20:43:51,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:43:51,355 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:43:51,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:43:51 WrapperNode [2021-05-02 20:43:51,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:43:51,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:43:51,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:43:51,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:43:51,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:43:51" (1/1) ... [2021-05-02 20:43:51,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:43:51" (1/1) ... [2021-05-02 20:43:51,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:43:51" (1/1) ... [2021-05-02 20:43:51,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:43:51" (1/1) ... [2021-05-02 20:43:51,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:43:51" (1/1) ... [2021-05-02 20:43:51,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:43:51" (1/1) ... [2021-05-02 20:43:51,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:43:51" (1/1) ... [2021-05-02 20:43:51,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:43:51,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:43:51,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:43:51,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:43:51,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:43:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:43:51,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:43:51,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:43:51,484 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:43:51,484 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:43:51,485 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:43:51,485 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:43:51,485 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:43:51,485 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:43:51,485 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:43:51,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:43:51,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:43:51,486 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:43:51,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:43:51,487 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:43:51,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:43:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:43:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:43:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:43:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:43:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:43:51,685 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:43:51,685 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:43:51,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:43:51 BoogieIcfgContainer [2021-05-02 20:43:51,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:43:51,687 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:43:51,687 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:43:51,688 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:43:51,690 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:43:51" (1/1) ... [2021-05-02 20:43:51,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:43:51 BasicIcfg [2021-05-02 20:43:51,721 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:43:51,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:43:51,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:43:51,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:43:51,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:43:51" (1/4) ... [2021-05-02 20:43:51,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ee57e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:43:51, skipping insertion in model container [2021-05-02 20:43:51,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:43:51" (2/4) ... [2021-05-02 20:43:51,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ee57e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:43:51, skipping insertion in model container [2021-05-02 20:43:51,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:43:51" (3/4) ... [2021-05-02 20:43:51,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ee57e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:43:51, skipping insertion in model container [2021-05-02 20:43:51,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:43:51" (4/4) ... [2021-05-02 20:43:51,727 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound5.cJordan [2021-05-02 20:43:51,732 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:43:51,736 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:43:51,749 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:43:51,764 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:43:51,764 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:43:51,764 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:43:51,764 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:43:51,764 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:43:51,765 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:43:51,765 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:43:51,765 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:43:51,775 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:43:51,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 20:43:51,780 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:43:51,781 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 20:43:51,781 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:43:51,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:43:51,786 INFO L82 PathProgramCache]: Analyzing trace with hash 734203501, now seen corresponding path program 1 times [2021-05-02 20:43:51,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:43:51,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567683470] [2021-05-02 20:43:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:43:51,910 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:43:51,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068990099] [2021-05-02 20:43:51,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:43:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:43:52,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 20:43:52,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:43:52,093 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 20:43:52,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:43:52,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567683470] [2021-05-02 20:43:52,094 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:43:52,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068990099] [2021-05-02 20:43:52,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068990099] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:43:52,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:43:52,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 20:43:52,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664971845] [2021-05-02 20:43:52,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 20:43:52,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:43:52,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 20:43:52,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:43:52,111 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 20:43:52,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:43:52,124 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-05-02 20:43:52,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 20:43:52,125 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 20:43:52,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:43:52,130 INFO L225 Difference]: With dead ends: 30 [2021-05-02 20:43:52,131 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 20:43:52,132 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 20:43:52,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 20:43:52,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 20:43:52,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:43:52,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-02 20:43:52,159 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-02 20:43:52,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:43:52,159 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-02 20:43:52,160 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 20:43:52,160 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-02 20:43:52,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:43:52,162 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:43:52,162 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:43:52,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 20:43:52,385 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:43:52,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:43:52,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1669026344, now seen corresponding path program 1 times [2021-05-02 20:43:52,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:43:52,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569178658] [2021-05-02 20:43:52,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:43:52,400 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:43:52,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882886116] [2021-05-02 20:43:52,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:43:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:43:52,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:43:52,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:43:52,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:52,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:52,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:52,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:52,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:43:52,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:43:52,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569178658] [2021-05-02 20:43:52,552 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:43:52,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882886116] [2021-05-02 20:43:52,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882886116] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:43:52,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:43:52,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:43:52,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420445489] [2021-05-02 20:43:52,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:43:52,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:43:52,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:43:52,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:43:52,555 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:43:52,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:43:52,566 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-05-02 20:43:52,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:43:52,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:43:52,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:43:52,567 INFO L225 Difference]: With dead ends: 27 [2021-05-02 20:43:52,567 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 20:43:52,568 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:43:52,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 20:43:52,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 20:43:52,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:43:52,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 20:43:52,572 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-02 20:43:52,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:43:52,573 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 20:43:52,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:43:52,574 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 20:43:52,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:43:52,574 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:43:52,574 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:43:52,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:43:52,789 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:43:52,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:43:52,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1667953868, now seen corresponding path program 1 times [2021-05-02 20:43:52,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:43:52,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276661366] [2021-05-02 20:43:52,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:43:52,815 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:43:52,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745471577] [2021-05-02 20:43:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:43:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:43:52,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:43:52,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:43:52,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:52,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:53,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:53,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:53,141 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 20:43:53,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:43:53,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276661366] [2021-05-02 20:43:53,142 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:43:53,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745471577] [2021-05-02 20:43:53,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745471577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:43:53,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:43:53,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:43:53,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115571257] [2021-05-02 20:43:53,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:43:53,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:43:53,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:43:53,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:43:53,144 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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 20:43:55,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:43:55,296 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-05-02 20:43:55,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:43:55,296 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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 23 [2021-05-02 20:43:55,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:43:55,298 INFO L225 Difference]: With dead ends: 35 [2021-05-02 20:43:55,298 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:43:55,298 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:43:55,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:43:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-02 20:43:55,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:43:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 20:43:55,309 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 20:43:55,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:43:55,309 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 20:43:55,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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 20:43:55,309 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 20:43:55,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:43:55,310 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:43:55,310 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, 1] [2021-05-02 20:43:55,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:43:55,527 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:43:55,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:43:55,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1179905874, now seen corresponding path program 1 times [2021-05-02 20:43:55,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:43:55,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517919633] [2021-05-02 20:43:55,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:43:55,541 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:43:55,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666928634] [2021-05-02 20:43:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:43:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:43:55,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:43:55,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:43:55,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:55,834 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 20:43:55,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:43:55,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517919633] [2021-05-02 20:43:55,835 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:43:55,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666928634] [2021-05-02 20:43:55,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666928634] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:43:55,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:43:55,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:43:55,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095967164] [2021-05-02 20:43:55,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:43:55,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:43:55,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:43:55,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:43:55,837 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 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 20:44:08,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:44:08,339 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-05-02 20:44:08,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:44:08,339 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 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 29 [2021-05-02 20:44:08,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:44:08,341 INFO L225 Difference]: With dead ends: 37 [2021-05-02 20:44:08,341 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:44:08,342 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 164.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:44:08,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:44:08,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:44:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:44:08,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-02 20:44:08,346 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2021-05-02 20:44:08,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:44:08,346 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-02 20:44:08,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 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 20:44:08,347 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-02 20:44:08,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:44:08,348 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:44:08,348 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:44:08,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:44:08,557 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:44:08,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:44:08,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1668946595, now seen corresponding path program 1 times [2021-05-02 20:44:08,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:44:08,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899242991] [2021-05-02 20:44:08,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:44:08,565 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:44:08,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735183547] [2021-05-02 20:44:08,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:44:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:44:08,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:44:08,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:44:08,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:08,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:08,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:08,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:08,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:08,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:08,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:08,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:44:08,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:44:08,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899242991] [2021-05-02 20:44:08,724 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:44:08,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735183547] [2021-05-02 20:44:08,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735183547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:44:08,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:44:08,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:44:08,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010314054] [2021-05-02 20:44:08,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:44:08,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:44:08,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:44:08,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:44:08,726 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:44:08,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:44:08,757 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-05-02 20:44:08,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:44:08,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 20:44:08,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:44:08,758 INFO L225 Difference]: With dead ends: 36 [2021-05-02 20:44:08,758 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 20:44:08,759 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:44:08,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 20:44:08,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 20:44:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:44:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-05-02 20:44:08,763 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 32 [2021-05-02 20:44:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:44:08,763 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-05-02 20:44:08,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:44:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-05-02 20:44:08,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:44:08,764 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:44:08,764 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 20:44:08,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:44:08,986 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:44:08,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:44:08,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1670019071, now seen corresponding path program 1 times [2021-05-02 20:44:08,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:44:08,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95089334] [2021-05-02 20:44:08,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:44:08,998 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:44:08,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303840238] [2021-05-02 20:44:08,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:44:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:44:09,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:44:09,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:44:09,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:09,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,180 WARN L205 SmtUtils]: Spent 2.96 s on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 20:44:12,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:44:12,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:44:12,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95089334] [2021-05-02 20:44:12,300 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:44:12,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303840238] [2021-05-02 20:44:12,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303840238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:44:12,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:44:12,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:44:12,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350961531] [2021-05-02 20:44:12,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:44:12,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:44:12,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:44:12,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:44:12,302 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:44:33,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:44:33,157 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-05-02 20:44:33,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:44:33,157 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 20:44:33,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:44:33,158 INFO L225 Difference]: With dead ends: 54 [2021-05-02 20:44:33,158 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 20:44:33,158 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 3101.9ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:44:33,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 20:44:33,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-05-02 20:44:33,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:44:33,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-05-02 20:44:33,163 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 32 [2021-05-02 20:44:33,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:44:33,164 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-05-02 20:44:33,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:44:33,164 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-05-02 20:44:33,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:44:33,164 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:44:33,164 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 20:44:33,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:44:33,373 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:44:33,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:44:33,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1737444544, now seen corresponding path program 1 times [2021-05-02 20:44:33,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:44:33,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548808331] [2021-05-02 20:44:33,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:44:33,390 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:44:33,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92403417] [2021-05-02 20:44:33,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:44:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:44:33,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:44:33,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:44:33,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:33,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:33,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:33,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:44,874 WARN L205 SmtUtils]: Spent 9.05 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:45:00,983 WARN L205 SmtUtils]: Spent 8.04 s on a formula simplification that was a NOOP. DAG size: 33 [2021-05-02 20:45:01,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:01,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 3 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:45:01,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:01,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548808331] [2021-05-02 20:45:01,075 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:45:01,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92403417] [2021-05-02 20:45:01,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92403417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:45:01,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:45:01,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:45:01,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634650086] [2021-05-02 20:45:01,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:45:01,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:45:01,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:45:01,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=104, Unknown=5, NotChecked=0, Total=132 [2021-05-02 20:45:01,077 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:46:02,152 WARN L205 SmtUtils]: Spent 29.87 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 20:46:35,239 WARN L205 SmtUtils]: Spent 8.06 s on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 20:47:17,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:47:17,803 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2021-05-02 20:47:17,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:47:17,803 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 20:47:17,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:47:17,804 INFO L225 Difference]: With dead ends: 57 [2021-05-02 20:47:17,804 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 20:47:17,804 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 94428.7ms TimeCoverageRelationStatistics Valid=52, Invalid=239, Unknown=15, NotChecked=0, Total=306 [2021-05-02 20:47:17,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 20:47:17,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2021-05-02 20:47:17,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 41 states have internal predecessors, (45), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:47:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-05-02 20:47:17,809 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 32 [2021-05-02 20:47:17,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:47:17,809 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-05-02 20:47:17,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:47:17,810 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-05-02 20:47:17,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:47:17,810 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:47:17,810 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-05-02 20:47:18,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:18,019 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:47:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:47:18,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1377493560, now seen corresponding path program 2 times [2021-05-02 20:47:18,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:47:18,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675431148] [2021-05-02 20:47:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:47:18,027 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:47:18,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041357002] [2021-05-02 20:47:18,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:18,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:47:18,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:47:18,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:47:18,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:47:18,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:47:18,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:47:18,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675431148] [2021-05-02 20:47:18,215 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:47:18,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041357002] [2021-05-02 20:47:18,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041357002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:47:18,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:47:18,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:47:18,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349336611] [2021-05-02 20:47:18,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:47:18,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:47:18,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:47:18,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:47:18,216 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:47:18,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:47:18,263 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2021-05-02 20:47:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:47:18,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 20:47:18,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:47:18,264 INFO L225 Difference]: With dead ends: 70 [2021-05-02 20:47:18,264 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 20:47:18,264 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:47:18,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 20:47:18,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-05-02 20:47:18,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:47:18,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2021-05-02 20:47:18,271 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 41 [2021-05-02 20:47:18,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:47:18,272 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2021-05-02 20:47:18,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:47:18,272 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2021-05-02 20:47:18,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:47:18,272 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:47:18,273 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:47:18,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 20:47:18,493 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:47:18,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:47:18,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1378566036, now seen corresponding path program 2 times [2021-05-02 20:47:18,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:47:18,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344667634] [2021-05-02 20:47:18,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:47:18,500 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:47:18,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016074146] [2021-05-02 20:47:18,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:18,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:47:18,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:47:18,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:47:18,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:47:18,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:18,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 20:47:19,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:47:19,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344667634] [2021-05-02 20:47:19,017 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:47:19,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016074146] [2021-05-02 20:47:19,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016074146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:47:19,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:47:19,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:47:19,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138658386] [2021-05-02 20:47:19,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:47:19,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:47:19,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:47:19,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:47:19,019 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:47:40,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:47:40,191 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2021-05-02 20:47:40,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:47:40,192 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 20:47:40,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:47:40,193 INFO L225 Difference]: With dead ends: 86 [2021-05-02 20:47:40,193 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 20:47:40,193 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 207.1ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:47:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 20:47:40,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2021-05-02 20:47:40,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 62 states have internal predecessors, (71), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:47:40,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2021-05-02 20:47:40,200 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 41 [2021-05-02 20:47:40,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:47:40,200 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2021-05-02 20:47:40,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:47:40,200 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2021-05-02 20:47:40,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:47:40,201 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:47:40,201 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:47:40,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:40,415 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:47:40,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:47:40,415 INFO L82 PathProgramCache]: Analyzing trace with hash -2028897579, now seen corresponding path program 1 times [2021-05-02 20:47:40,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:47:40,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787691147] [2021-05-02 20:47:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:47:40,424 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:47:40,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001780446] [2021-05-02 20:47:40,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:47:40,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:47:40,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:47:40,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:40,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:40,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:40,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:40,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:40,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:40,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:40,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 20:47:40,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:47:40,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787691147] [2021-05-02 20:47:40,587 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:47:40,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001780446] [2021-05-02 20:47:40,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001780446] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:47:40,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:47:40,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:47:40,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833255093] [2021-05-02 20:47:40,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:47:40,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:47:40,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:47:40,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:47:40,588 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:47:40,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:47:40,611 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2021-05-02 20:47:40,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:47:40,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2021-05-02 20:47:40,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:47:40,612 INFO L225 Difference]: With dead ends: 81 [2021-05-02 20:47:40,612 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 20:47:40,612 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:47:40,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 20:47:40,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-05-02 20:47:40,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 60 states have internal predecessors, (67), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:47:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2021-05-02 20:47:40,618 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 41 [2021-05-02 20:47:40,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:47:40,618 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2021-05-02 20:47:40,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:47:40,618 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2021-05-02 20:47:40,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:47:40,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:47:40,619 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:47:40,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:40,841 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:47:40,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:47:40,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1755535540, now seen corresponding path program 2 times [2021-05-02 20:47:40,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:47:40,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277246771] [2021-05-02 20:47:40,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:47:40,853 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:47:40,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661846775] [2021-05-02 20:47:40,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:40,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:47:40,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:47:40,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:47:40,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:47:41,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:41,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:41,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:41,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:41,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:41,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,690 WARN L205 SmtUtils]: Spent 15.56 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:47:58,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:58,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,017 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 20:48:03,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:03,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,010 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 20:48:16,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:16,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,339 WARN L205 SmtUtils]: Spent 2.38 s on a formula simplification that was a NOOP. DAG size: 74 [2021-05-02 20:48:29,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:29,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:31,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:31,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:31,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:31,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:31,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:31,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:31,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:31,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:31,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:48:31,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:48:31,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277246771] [2021-05-02 20:48:31,674 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:48:31,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661846775] [2021-05-02 20:48:31,674 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-02 20:48:31,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 20:48:31,896 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.AbstractGeneralizedAffineTerm.toTerm(AbstractGeneralizedAffineTerm.java:279) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:436) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfTir.tryToEliminateConjuncts(XnfTir.java:207) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfTir.tryToEliminateSingleDisjuct(XnfTir.java:143) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfTir.tryToEliminate(XnfTir.java:114) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.applyEliminationInner(PartialQuantifierElimination.java:531) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.applyEliminationOuter(PartialQuantifierElimination.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.applyTir(PartialQuantifierElimination.java:435) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:279) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:100) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:612) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-02 20:48:31,901 INFO L168 Benchmark]: Toolchain (without parser) took 280710.87 ms. Allocated memory was 188.7 MB in the beginning and 226.5 MB in the end (delta: 37.7 MB). Free memory was 155.1 MB in the beginning and 90.8 MB in the end (delta: 64.3 MB). Peak memory consumption was 102.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:48:31,901 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 188.7 MB. Free memory was 171.9 MB in the beginning and 171.8 MB in the end (delta: 106.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:48:31,901 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.86 ms. Allocated memory is still 188.7 MB. Free memory was 154.9 MB in the beginning and 145.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:48:31,901 INFO L168 Benchmark]: Boogie Preprocessor took 69.35 ms. Allocated memory is still 188.7 MB. Free memory was 145.1 MB in the beginning and 172.9 MB in the end (delta: -27.7 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:48:31,901 INFO L168 Benchmark]: RCFGBuilder took 260.07 ms. Allocated memory is still 188.7 MB. Free memory was 172.9 MB in the beginning and 157.5 MB in the end (delta: 15.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:48:31,901 INFO L168 Benchmark]: IcfgTransformer took 34.15 ms. Allocated memory is still 188.7 MB. Free memory was 157.5 MB in the beginning and 156.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:48:31,901 INFO L168 Benchmark]: TraceAbstraction took 280177.35 ms. Allocated memory was 188.7 MB in the beginning and 226.5 MB in the end (delta: 37.7 MB). Free memory was 155.9 MB in the beginning and 90.8 MB in the end (delta: 65.1 MB). Peak memory consumption was 103.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:48:31,902 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 188.7 MB. Free memory was 171.9 MB in the beginning and 171.8 MB in the end (delta: 106.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 164.86 ms. Allocated memory is still 188.7 MB. Free memory was 154.9 MB in the beginning and 145.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 69.35 ms. Allocated memory is still 188.7 MB. Free memory was 145.1 MB in the beginning and 172.9 MB in the end (delta: -27.7 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 260.07 ms. Allocated memory is still 188.7 MB. Free memory was 172.9 MB in the beginning and 157.5 MB in the end (delta: 15.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 34.15 ms. Allocated memory is still 188.7 MB. Free memory was 157.5 MB in the beginning and 156.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 280177.35 ms. Allocated memory was 188.7 MB in the beginning and 226.5 MB in the end (delta: 37.7 MB). Free memory was 155.9 MB in the beginning and 90.8 MB in the end (delta: 65.1 MB). Peak memory consumption was 103.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.AbstractGeneralizedAffineTerm.toTerm(AbstractGeneralizedAffineTerm.java:279) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...