/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/geo3-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:18:34,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:18:34,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:18:34,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:18:34,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:18:34,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:18:34,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:18:34,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:18:34,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:18:34,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:18:34,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:18:34,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:18:34,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:18:34,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:18:34,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:18:34,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:18:34,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:18:34,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:18:34,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:18:34,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:18:34,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:18:34,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:18:34,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:18:34,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:18:34,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:18:34,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:18:34,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:18:34,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:18:34,415 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:18:34,423 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:18:34,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:18:34,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:18:34,424 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:18:34,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:18:34,425 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:18:34,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:18:34,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:18:34,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:18:34,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:18:34,425 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:18:34,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:18:34,426 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:18:34,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:18:34,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:18:34,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:18:34,426 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:18:34,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:18:34,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:18:34,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:18:34,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:18:34,428 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:18:34,428 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:18:34,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:18:34,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:18:34,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:18:34,705 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:18:34,706 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:18:34,707 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo3-ll.c [2021-05-02 19:18:34,760 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1956bfa2/355c16c23b1c46d698e35d5502ace59d/FLAG8ae7a275f [2021-05-02 19:18:35,095 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:18:35,095 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo3-ll.c [2021-05-02 19:18:35,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1956bfa2/355c16c23b1c46d698e35d5502ace59d/FLAG8ae7a275f [2021-05-02 19:18:35,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1956bfa2/355c16c23b1c46d698e35d5502ace59d [2021-05-02 19:18:35,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:18:35,111 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:18:35,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:18:35,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:18:35,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:18:35,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:18:35" (1/1) ... [2021-05-02 19:18:35,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bd0aa46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:35, skipping insertion in model container [2021-05-02 19:18:35,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:18:35" (1/1) ... [2021-05-02 19:18:35,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:18:35,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:18:35,240 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/geo3-ll.c[525,538] [2021-05-02 19:18:35,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:18:35,257 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:18:35,268 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/geo3-ll.c[525,538] [2021-05-02 19:18:35,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:18:35,289 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:18:35,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:35 WrapperNode [2021-05-02 19:18:35,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:18:35,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:18:35,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:18:35,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:18:35,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:35" (1/1) ... [2021-05-02 19:18:35,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:35" (1/1) ... [2021-05-02 19:18:35,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:35" (1/1) ... [2021-05-02 19:18:35,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:35" (1/1) ... [2021-05-02 19:18:35,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:35" (1/1) ... [2021-05-02 19:18:35,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:35" (1/1) ... [2021-05-02 19:18:35,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:35" (1/1) ... [2021-05-02 19:18:35,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:18:35,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:18:35,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:18:35,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:18:35,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:18:35,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:18:35,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:18:35,419 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:18:35,419 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:18:35,420 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:18:35,420 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:18:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:18:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:18:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:18:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:18:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:18:35,420 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:18:35,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:18:35,421 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:18:35,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:18:35,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:18:35,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:18:35,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:18:35,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:18:35,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:18:35,656 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:18:35,656 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:18:35,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:18:35 BoogieIcfgContainer [2021-05-02 19:18:35,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:18:35,658 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:18:35,658 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:18:35,659 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:18:35,662 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:18:35" (1/1) ... [2021-05-02 19:18:35,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:18:35 BasicIcfg [2021-05-02 19:18:35,676 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:18:35,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:18:35,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:18:35,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:18:35,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:18:35" (1/4) ... [2021-05-02 19:18:35,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b458e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:18:35, skipping insertion in model container [2021-05-02 19:18:35,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:35" (2/4) ... [2021-05-02 19:18:35,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b458e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:18:35, skipping insertion in model container [2021-05-02 19:18:35,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:18:35" (3/4) ... [2021-05-02 19:18:35,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b458e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:18:35, skipping insertion in model container [2021-05-02 19:18:35,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:18:35" (4/4) ... [2021-05-02 19:18:35,682 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll.cJordan [2021-05-02 19:18:35,687 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:18:35,691 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:18:35,705 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:18:35,722 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:18:35,722 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:18:35,722 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:18:35,722 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:18:35,722 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:18:35,722 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:18:35,723 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:18:35,723 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:18:35,733 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 19:18:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 19:18:35,739 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:18:35,739 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:18:35,739 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:18:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:18:35,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1229966674, now seen corresponding path program 1 times [2021-05-02 19:18:35,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:18:35,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472914984] [2021-05-02 19:18:35,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:18:35,833 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:18:35,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290692325] [2021-05-02 19:18:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:18:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:18:35,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 19:18:35,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:18:36,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:36,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:18:36,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:18:36,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472914984] [2021-05-02 19:18:36,107 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:18:36,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290692325] [2021-05-02 19:18:36,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290692325] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:18:36,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:18:36,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 19:18:36,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523668847] [2021-05-02 19:18:36,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:18:36,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:18:36,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:18:36,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:18:36,126 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:18:36,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:18:36,185 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-02 19:18:36,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 19:18:36,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 19:18:36,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:18:36,192 INFO L225 Difference]: With dead ends: 32 [2021-05-02 19:18:36,193 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 19:18:36,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:18:36,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 19:18:36,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 19:18:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:18:36,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-05-02 19:18:36,223 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 11 [2021-05-02 19:18:36,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:18:36,223 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-05-02 19:18:36,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:18:36,224 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-05-02 19:18:36,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 19:18:36,224 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:18:36,225 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:18:36,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 19:18:36,429 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:18:36,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:18:36,430 INFO L82 PathProgramCache]: Analyzing trace with hash 726352862, now seen corresponding path program 1 times [2021-05-02 19:18:36,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:18:36,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954924262] [2021-05-02 19:18:36,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:18:36,444 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:18:36,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849469259] [2021-05-02 19:18:36,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:18:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:18:36,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:18:36,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:18:36,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:36,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:18:36,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:18:36,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954924262] [2021-05-02 19:18:36,693 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:18:36,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849469259] [2021-05-02 19:18:36,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849469259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:18:36,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:18:36,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:18:36,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640980121] [2021-05-02 19:18:36,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:18:36,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:18:36,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:18:36,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:18:36,695 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:18:40,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:18:40,839 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-05-02 19:18:40,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:18:40,840 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 19:18:40,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:18:40,840 INFO L225 Difference]: With dead ends: 31 [2021-05-02 19:18:40,841 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 19:18:40,841 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:18:40,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 19:18:40,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-05-02 19:18:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 20 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 19:18:40,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-02 19:18:40,846 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 18 [2021-05-02 19:18:40,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:18:40,846 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-02 19:18:40,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:18:40,846 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-02 19:18:40,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 19:18:40,847 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:18:40,847 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:18:41,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:18:41,058 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:18:41,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:18:41,060 INFO L82 PathProgramCache]: Analyzing trace with hash -996422662, now seen corresponding path program 1 times [2021-05-02 19:18:41,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:18:41,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502317704] [2021-05-02 19:18:41,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:18:41,077 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:18:41,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005178048] [2021-05-02 19:18:41,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:18:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:18:41,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 19:18:41,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:18:41,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:41,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 19:18:41,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:18:41,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502317704] [2021-05-02 19:18:41,247 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:18:41,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005178048] [2021-05-02 19:18:41,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005178048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:18:41,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:18:41,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:18:41,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232326637] [2021-05-02 19:18:41,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:18:41,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:18:41,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:18:41,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:18:41,249 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 19:18:43,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:18:43,316 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-05-02 19:18:43,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:18:43,317 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-02 19:18:43,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:18:43,318 INFO L225 Difference]: With dead ends: 33 [2021-05-02 19:18:43,318 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 19:18:43,319 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:18:43,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 19:18:43,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 19:18:43,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 19:18:43,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-05-02 19:18:43,321 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 24 [2021-05-02 19:18:43,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:18:43,322 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-05-02 19:18:43,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 19:18:43,322 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-05-02 19:18:43,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 19:18:43,322 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:18:43,322 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:18:43,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:18:43,529 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:18:43,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:18:43,529 INFO L82 PathProgramCache]: Analyzing trace with hash -796689234, now seen corresponding path program 2 times [2021-05-02 19:18:43,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:18:43,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645081884] [2021-05-02 19:18:43,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:18:43,538 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:18:43,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919002474] [2021-05-02 19:18:43,538 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:18:43,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:18:43,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:18:43,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 19:18:43,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:18:45,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:45,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:18:45,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:18:45,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645081884] [2021-05-02 19:18:45,742 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:18:45,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919002474] [2021-05-02 19:18:45,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919002474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:18:45,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:18:45,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:18:45,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367906701] [2021-05-02 19:18:45,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:18:45,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:18:45,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:18:45,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=55, Unknown=1, NotChecked=0, Total=72 [2021-05-02 19:18:45,744 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:18:56,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:18:56,324 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-02 19:18:56,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:18:56,325 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-05-02 19:18:56,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:18:56,325 INFO L225 Difference]: With dead ends: 36 [2021-05-02 19:18:56,325 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 19:18:56,326 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2101.9ms TimeCoverageRelationStatistics Valid=27, Invalid=82, Unknown=1, NotChecked=0, Total=110 [2021-05-02 19:18:56,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 19:18:56,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 19:18:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 19:18:56,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-02 19:18:56,334 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 25 [2021-05-02 19:18:56,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:18:56,334 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-02 19:18:56,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:18:56,334 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-02 19:18:56,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 19:18:56,335 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:18:56,335 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:18:56,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:18:56,541 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:18:56,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:18:56,542 INFO L82 PathProgramCache]: Analyzing trace with hash 84982238, now seen corresponding path program 3 times [2021-05-02 19:18:56,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:18:56,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899242991] [2021-05-02 19:18:56,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:18:56,549 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:18:56,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735183547] [2021-05-02 19:18:56,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:18:56,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 19:18:56,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:18:56,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 19:18:56,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:18:58,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:00,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:02,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:02,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:02,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:02,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:02,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:02,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:02,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:04,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:04,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:04,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:04,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:04,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:05,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:07,039 WARN L838 $PredicateComparison]: unable to prove that (or (= |c___VERIFIER_assert_#in~cond| 1) (and (= |c___VERIFIER_assert_#in~cond| 0) (exists ((v_main_~z~0_BEFORE_CALL_11 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_11))) (= (+ (* v_main_~z~0_BEFORE_CALL_11 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_11) v_main_~z~0_BEFORE_CALL_11 v_main_~a~0_BEFORE_CALL_11) .cse0))) (not (= v_main_~z~0_BEFORE_CALL_11 0)) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_11) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_11) 0) (not (= (+ (* v_main_~z~0_BEFORE_CALL_11 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11) (+ (* v_main_~z~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8)))))))) is different from false [2021-05-02 19:19:07,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:07,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:09,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:09,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:09,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:09,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:09,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:11,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:11,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:11,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:11,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:11,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:11,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:13,252 WARN L838 $PredicateComparison]: unable to prove that (or (= c___VERIFIER_assert_~cond 1) (and (= c___VERIFIER_assert_~cond 0) (exists ((v_main_~z~0_BEFORE_CALL_11 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_11))) (= (+ (* v_main_~z~0_BEFORE_CALL_11 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_11) v_main_~z~0_BEFORE_CALL_11 v_main_~a~0_BEFORE_CALL_11) .cse0))) (not (= v_main_~z~0_BEFORE_CALL_11 0)) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_11) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_11) 0) (not (= (+ (* v_main_~z~0_BEFORE_CALL_11 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11) (+ (* v_main_~z~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8)))))))) is different from false [2021-05-02 19:19:13,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:13,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:15,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:15,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:15,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:15,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:15,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:17,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:17,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:17,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:17,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:17,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:17,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:19,453 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_11 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_11))) (= (+ (* v_main_~z~0_BEFORE_CALL_11 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_11) v_main_~z~0_BEFORE_CALL_11 v_main_~a~0_BEFORE_CALL_11) .cse0))) (not (= v_main_~z~0_BEFORE_CALL_11 0)) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_11) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_11) 0) (not (= (+ (* v_main_~z~0_BEFORE_CALL_11 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11) (+ (* v_main_~z~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8)))))) is different from false [2021-05-02 19:19:21,462 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_11 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_11))) (= (+ (* v_main_~z~0_BEFORE_CALL_11 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_11) v_main_~z~0_BEFORE_CALL_11 v_main_~a~0_BEFORE_CALL_11) .cse0))) (not (= v_main_~z~0_BEFORE_CALL_11 0)) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_11) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_11) 0) (not (= (+ (* v_main_~z~0_BEFORE_CALL_11 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11) (+ (* v_main_~z~0_BEFORE_CALL_11 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8)))))) is different from true [2021-05-02 19:19:21,462 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 1 not checked. [2021-05-02 19:19:21,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:19:21,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899242991] [2021-05-02 19:19:21,463 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:19:21,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735183547] [2021-05-02 19:19:21,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735183547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:19:21,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:19:21,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:19:21,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344667634] [2021-05-02 19:19:21,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:19:21,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:19:21,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:19:21,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=30, Unknown=5, NotChecked=36, Total=90 [2021-05-02 19:19:21,464 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:19:50,814 WARN L205 SmtUtils]: Spent 10.46 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 19:20:15,216 WARN L205 SmtUtils]: Spent 21.44 s on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-02 19:20:17,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:20:17,227 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-02 19:20:17,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:20:17,296 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2021-05-02 19:20:17,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:20:17,297 INFO L225 Difference]: With dead ends: 34 [2021-05-02 19:20:17,297 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:20:17,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 55559.0ms TimeCoverageRelationStatistics Valid=31, Invalid=60, Unknown=11, NotChecked=54, Total=156 [2021-05-02 19:20:17,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:20:17,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:20:17,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 19:20:17,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:20:17,298 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-05-02 19:20:17,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:20:17,298 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:20:17,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:20:17,298 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:20:17,298 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:20:17,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:20:17,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:20:17 BasicIcfg [2021-05-02 19:20:17,509 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:20:17,509 INFO L168 Benchmark]: Toolchain (without parser) took 102398.10 ms. Allocated memory was 197.1 MB in the beginning and 242.2 MB in the end (delta: 45.1 MB). Free memory was 162.5 MB in the beginning and 130.9 MB in the end (delta: 31.7 MB). Peak memory consumption was 77.9 MB. Max. memory is 8.0 GB. [2021-05-02 19:20:17,509 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 197.1 MB. Free memory is still 179.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:20:17,510 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.00 ms. Allocated memory is still 197.1 MB. Free memory was 162.4 MB in the beginning and 152.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 19:20:17,510 INFO L168 Benchmark]: Boogie Preprocessor took 62.02 ms. Allocated memory is still 197.1 MB. Free memory was 152.5 MB in the beginning and 180.0 MB in the end (delta: -27.5 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. [2021-05-02 19:20:17,510 INFO L168 Benchmark]: RCFGBuilder took 304.04 ms. Allocated memory is still 197.1 MB. Free memory was 180.0 MB in the beginning and 165.8 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:20:17,510 INFO L168 Benchmark]: IcfgTransformer took 17.29 ms. Allocated memory is still 197.1 MB. Free memory was 165.8 MB in the beginning and 164.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:20:17,510 INFO L168 Benchmark]: TraceAbstraction took 101831.90 ms. Allocated memory was 197.1 MB in the beginning and 242.2 MB in the end (delta: 45.1 MB). Free memory was 163.8 MB in the beginning and 130.9 MB in the end (delta: 32.9 MB). Peak memory consumption was 78.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:20:17,510 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 197.1 MB. Free memory is still 179.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 178.00 ms. Allocated memory is still 197.1 MB. Free memory was 162.4 MB in the beginning and 152.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 62.02 ms. Allocated memory is still 197.1 MB. Free memory was 152.5 MB in the beginning and 180.0 MB in the end (delta: -27.5 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 304.04 ms. Allocated memory is still 197.1 MB. Free memory was 180.0 MB in the beginning and 165.8 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 17.29 ms. Allocated memory is still 197.1 MB. Free memory was 165.8 MB in the beginning and 164.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 101831.90 ms. Allocated memory was 197.1 MB in the beginning and 242.2 MB in the end (delta: 45.1 MB). Free memory was 163.8 MB in the beginning and 130.9 MB in the end (delta: 32.9 MB). Peak memory consumption was 78.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 101785.7ms, OverallIterations: 5, TraceHistogramMax: 4, EmptinessCheckTime: 11.2ms, AutomataDifference: 72714.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 69 SDtfs, 49 SDslu, 292 SDs, 0 SdLazy, 207 SolverSat, 10 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 27106.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 57814.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=4, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 32.8ms AutomataMinimizationTime, 5 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 43.8ms SsaConstructionTime, 127.7ms SatisfiabilityAnalysisTime, 27433.4ms InterpolantComputationTime, 110 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 105 ConstructedInterpolants, 3 QuantifiedInterpolants, 730 SizeOfPredicates, 10 NumberOfNonLiveVariables, 610 ConjunctsInSsa, 98 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 47/63 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...