/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/hard-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:52:57,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:52:57,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:52:57,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:52:57,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:52:57,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:52:57,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:52:57,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:52:57,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:52:57,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:52:57,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:52:57,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:52:57,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:52:57,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:52:57,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:52:57,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:52:57,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:52:57,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:52:57,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:52:57,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:52:57,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:52:57,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:52:57,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:52:57,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:52:57,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:52:57,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:52:57,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:52:57,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:52:57,305 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:52:57,320 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:52:57,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:52:57,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:52:57,323 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:52:57,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:52:57,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:52:57,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:52:57,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:52:57,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:52:57,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:52:57,324 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:52:57,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:52:57,325 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:52:57,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:52:57,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:52:57,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:52:57,325 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:52:57,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:52:57,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:52:57,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:52:57,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:52:57,326 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:52:57,326 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:52:57,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:52:57,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:52:57,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:52:57,627 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:52:57,628 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:52:57,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound100.c [2021-05-02 20:52:57,673 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdd312c67/4a911088e6fc457f8a22e467b140e2df/FLAG1f6bd51b6 [2021-05-02 20:52:58,074 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:52:58,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound100.c [2021-05-02 20:52:58,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdd312c67/4a911088e6fc457f8a22e467b140e2df/FLAG1f6bd51b6 [2021-05-02 20:52:58,094 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdd312c67/4a911088e6fc457f8a22e467b140e2df [2021-05-02 20:52:58,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:52:58,098 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:52:58,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:52:58,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:52:58,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:52:58,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:52:58" (1/1) ... [2021-05-02 20:52:58,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7516058b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:58, skipping insertion in model container [2021-05-02 20:52:58,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:52:58" (1/1) ... [2021-05-02 20:52:58,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:52:58,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:52:58,231 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/hard-ll_valuebound100.c[546,559] [2021-05-02 20:52:58,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:52:58,266 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:52:58,285 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/hard-ll_valuebound100.c[546,559] [2021-05-02 20:52:58,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:52:58,310 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:52:58,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:58 WrapperNode [2021-05-02 20:52:58,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:52:58,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:52:58,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:52:58,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:52:58,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:58" (1/1) ... [2021-05-02 20:52:58,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:58" (1/1) ... [2021-05-02 20:52:58,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:58" (1/1) ... [2021-05-02 20:52:58,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:58" (1/1) ... [2021-05-02 20:52:58,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:58" (1/1) ... [2021-05-02 20:52:58,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:58" (1/1) ... [2021-05-02 20:52:58,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:58" (1/1) ... [2021-05-02 20:52:58,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:52:58,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:52:58,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:52:58,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:52:58,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:58" (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 20:52:58,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:52:58,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:52:58,405 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:52:58,406 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:52:58,406 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:52:58,406 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:52:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:52:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:52:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:52:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:52:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:52:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:52:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:52:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:52:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:52:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:52:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:52:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:52:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:52:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:52:58,643 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:52:58,643 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:52:58,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:58 BoogieIcfgContainer [2021-05-02 20:52:58,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:52:58,645 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:52:58,645 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:52:58,659 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:52:58,661 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:58" (1/1) ... [2021-05-02 20:52:58,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:52:58 BasicIcfg [2021-05-02 20:52:58,681 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:52:58,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:52:58,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:52:58,684 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:52:58,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:52:58" (1/4) ... [2021-05-02 20:52:58,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b1b07ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:52:58, skipping insertion in model container [2021-05-02 20:52:58,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:58" (2/4) ... [2021-05-02 20:52:58,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b1b07ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:52:58, skipping insertion in model container [2021-05-02 20:52:58,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:58" (3/4) ... [2021-05-02 20:52:58,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b1b07ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:52:58, skipping insertion in model container [2021-05-02 20:52:58,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:52:58" (4/4) ... [2021-05-02 20:52:58,686 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound100.cJordan [2021-05-02 20:52:58,691 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:52:58,694 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:52:58,710 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:52:58,729 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:52:58,729 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:52:58,730 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:52:58,730 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:52:58,730 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:52:58,730 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:52:58,730 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:52:58,730 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:52:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 20:52:58,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:52:58,749 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:58,750 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:58,750 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:58,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:58,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-02 20:52:58,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:58,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195811549] [2021-05-02 20:52:58,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:58,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:58,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:58,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:52:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:58,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:52:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:52:58,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:58,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195811549] [2021-05-02 20:52:58,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195811549] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:58,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:58,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:52:58,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202755588] [2021-05-02 20:52:58,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:52:58,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:58,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:52:58,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:52:58,918 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:52:58,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:58,990 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 20:52:58,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:52:58,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 20:52:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:58,995 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:52:58,995 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:52:58,996 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:52:59,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:52:59,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 20:52:59,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:52:59,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 20:52:59,026 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 20:52:59,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:59,027 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 20:52:59,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:52:59,027 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 20:52:59,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:52:59,028 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:59,028 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:59,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:52:59,029 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:59,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:59,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-02 20:52:59,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:59,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801178138] [2021-05-02 20:52:59,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:59,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:59,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:59,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:52:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:59,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:52:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:52:59,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:59,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801178138] [2021-05-02 20:52:59,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801178138] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:59,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:59,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:52:59,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871568596] [2021-05-02 20:52:59,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:59,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:59,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:59,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:59,198 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 20:52:59,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:59,470 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-02 20:52:59,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:52:59,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-02 20:52:59,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:59,472 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:52:59,472 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:52:59,472 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:59,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:52:59,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 20:52:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:52:59,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 20:52:59,478 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 20:52:59,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:59,478 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 20:52:59,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 20:52:59,478 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 20:52:59,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:52:59,479 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:59,479 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 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 20:52:59,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:52:59,479 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:59,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:59,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-02 20:52:59,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:59,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025895189] [2021-05-02 20:52:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:59,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:59,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:59,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:52:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:59,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:52:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:59,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 20:52:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:52:59,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:59,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025895189] [2021-05-02 20:52:59,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025895189] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:59,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:59,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:52:59,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142549503] [2021-05-02 20:52:59,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:59,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:59,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:59,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:59,552 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:52:59,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:59,762 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-02 20:52:59,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:52:59,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:52:59,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:59,763 INFO L225 Difference]: With dead ends: 48 [2021-05-02 20:52:59,763 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 20:52:59,764 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:59,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 20:52:59,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 20:52:59,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:52:59,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 20:52:59,768 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 20:52:59,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:59,768 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 20:52:59,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:52:59,768 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 20:52:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:52:59,769 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:59,769 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:59,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 20:52:59,769 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:59,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-02 20:52:59,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:59,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254972159] [2021-05-02 20:52:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:59,777 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:59,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379936057] [2021-05-02 20:52:59,778 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 20:52:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:59,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:52:59,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 20:53:00,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:00,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254972159] [2021-05-02 20:53:00,050 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:00,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379936057] [2021-05-02 20:53:00,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379936057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:00,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:00,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:53:00,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632017176] [2021-05-02 20:53:00,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:53:00,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:00,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:53:00,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:53:00,051 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:53:00,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:00,201 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2021-05-02 20:53:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:53:00,202 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-02 20:53:00,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:00,202 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:53:00,203 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 20:53:00,203 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:53:00,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 20:53:00,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-02 20:53:00,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 20:53:00,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-05-02 20:53:00,207 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 38 [2021-05-02 20:53:00,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:00,207 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-05-02 20:53:00,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:53:00,208 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-05-02 20:53:00,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 20:53:00,208 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:00,208 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:53:00,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:00,424 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:00,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:00,425 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-02 20:53:00,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:00,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352279844] [2021-05-02 20:53:00,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:00,431 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:00,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273017481] [2021-05-02 20:53:00,432 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 20:53:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:00,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:53:00,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:00,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 20:53:00,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:00,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352279844] [2021-05-02 20:53:00,707 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:00,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273017481] [2021-05-02 20:53:00,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273017481] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:53:00,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:53:00,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 20:53:00,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576598547] [2021-05-02 20:53:00,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:53:00,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:00,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:53:00,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:53:00,709 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:53:00,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:00,829 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-05-02 20:53:00,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:53:00,830 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 20:53:00,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:00,830 INFO L225 Difference]: With dead ends: 67 [2021-05-02 20:53:00,830 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:53:00,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:53:00,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:53:00,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 20:53:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:53:00,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 20:53:00,835 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-02 20:53:00,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:00,835 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 20:53:00,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:53:00,835 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 20:53:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 20:53:00,836 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:00,836 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 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 20:53:01,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:01,052 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:01,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:01,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-02 20:53:01,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:01,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688249198] [2021-05-02 20:53:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:01,058 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:01,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475192984] [2021-05-02 20:53:01,059 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 20:53:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:01,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:53:01,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:01,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 20:53:01,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:01,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688249198] [2021-05-02 20:53:01,249 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:01,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475192984] [2021-05-02 20:53:01,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475192984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:01,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:01,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:53:01,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324757708] [2021-05-02 20:53:01,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:53:01,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:01,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:53:01,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:53:01,251 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:53:01,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:01,457 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2021-05-02 20:53:01,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:53:01,458 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-02 20:53:01,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:01,459 INFO L225 Difference]: With dead ends: 82 [2021-05-02 20:53:01,459 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 20:53:01,459 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:53:01,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 20:53:01,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 20:53:01,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 47 states have (on average 1.127659574468085) internal successors, (53), 49 states have internal predecessors, (53), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 20:53:01,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2021-05-02 20:53:01,465 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 55 [2021-05-02 20:53:01,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:01,465 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2021-05-02 20:53:01,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:53:01,465 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2021-05-02 20:53:01,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 20:53:01,466 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:01,466 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1, 1, 1, 1] [2021-05-02 20:53:01,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:01,681 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:01,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:01,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1292294975, now seen corresponding path program 1 times [2021-05-02 20:53:01,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:01,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044595823] [2021-05-02 20:53:01,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:01,687 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:01,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431612998] [2021-05-02 20:53:01,688 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 20:53:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:01,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 20:53:01,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:01,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 20:53:02,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:02,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044595823] [2021-05-02 20:53:02,050 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:02,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431612998] [2021-05-02 20:53:02,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431612998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:02,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:02,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:53:02,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536572186] [2021-05-02 20:53:02,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:53:02,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:02,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:53:02,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:53:02,052 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:53:02,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:02,292 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2021-05-02 20:53:02,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:53:02,293 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2021-05-02 20:53:02,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:02,293 INFO L225 Difference]: With dead ends: 89 [2021-05-02 20:53:02,293 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 20:53:02,294 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 151.1ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:53:02,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 20:53:02,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 20:53:02,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 52 states have internal predecessors, (56), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 20:53:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-05-02 20:53:02,298 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 62 [2021-05-02 20:53:02,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:02,298 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-05-02 20:53:02,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:53:02,298 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-05-02 20:53:02,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 20:53:02,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:02,299 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:53:02,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:02,514 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:02,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:02,515 INFO L82 PathProgramCache]: Analyzing trace with hash 294687610, now seen corresponding path program 2 times [2021-05-02 20:53:02,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:02,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786809300] [2021-05-02 20:53:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:02,523 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:02,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83947957] [2021-05-02 20:53:02,523 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 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 20:53:02,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:53:02,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:53:02,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 20:53:02,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:02,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 50 proven. 21 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 20:53:03,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:03,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786809300] [2021-05-02 20:53:03,112 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:03,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83947957] [2021-05-02 20:53:03,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83947957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:03,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:03,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:53:03,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432560766] [2021-05-02 20:53:03,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:53:03,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:03,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:53:03,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:53:03,113 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:53:03,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:03,484 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2021-05-02 20:53:03,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:53:03,484 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 72 [2021-05-02 20:53:03,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:03,485 INFO L225 Difference]: With dead ends: 117 [2021-05-02 20:53:03,485 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 20:53:03,485 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:53:03,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 20:53:03,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-05-02 20:53:03,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 72 states have internal predecessors, (79), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 20:53:03,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 136 transitions. [2021-05-02 20:53:03,491 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 136 transitions. Word has length 72 [2021-05-02 20:53:03,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:03,491 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 136 transitions. [2021-05-02 20:53:03,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:53:03,492 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 136 transitions. [2021-05-02 20:53:03,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 20:53:03,492 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:03,492 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:53:03,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 20:53:03,708 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:03,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:03,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2021-05-02 20:53:03,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:03,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740719542] [2021-05-02 20:53:03,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:03,714 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:03,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599084527] [2021-05-02 20:53:03,715 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 20:53:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:03,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:53:03,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:03,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-05-02 20:53:04,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:04,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740719542] [2021-05-02 20:53:04,033 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:04,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599084527] [2021-05-02 20:53:04,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599084527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:04,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:04,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:53:04,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860222455] [2021-05-02 20:53:04,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:53:04,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:04,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:53:04,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:53:04,034 INFO L87 Difference]: Start difference. First operand 116 states and 136 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:53:04,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:04,205 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2021-05-02 20:53:04,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:53:04,206 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-02 20:53:04,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:04,207 INFO L225 Difference]: With dead ends: 127 [2021-05-02 20:53:04,207 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 20:53:04,207 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:53:04,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 20:53:04,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-05-02 20:53:04,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 76 states have (on average 1.144736842105263) internal successors, (87), 78 states have internal predecessors, (87), 32 states have call successors, (32), 17 states have call predecessors, (32), 16 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 20:53:04,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2021-05-02 20:53:04,212 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 75 [2021-05-02 20:53:04,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:04,213 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2021-05-02 20:53:04,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:53:04,213 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2021-05-02 20:53:04,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 20:53:04,214 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:04,214 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:53:04,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:04,429 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:04,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:04,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1714864424, now seen corresponding path program 2 times [2021-05-02 20:53:04,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:04,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074058955] [2021-05-02 20:53:04,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:04,436 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:04,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625189017] [2021-05-02 20:53:04,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:04,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:53:04,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:53:04,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:53:04,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:04,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 41 proven. 7 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-05-02 20:53:04,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:04,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074058955] [2021-05-02 20:53:04,662 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:04,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625189017] [2021-05-02 20:53:04,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625189017] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:04,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:04,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:53:04,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972467129] [2021-05-02 20:53:04,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:53:04,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:04,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:53:04,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:53:04,664 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:53:04,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:04,803 INFO L93 Difference]: Finished difference Result 136 states and 163 transitions. [2021-05-02 20:53:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:53:04,804 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 79 [2021-05-02 20:53:04,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:04,804 INFO L225 Difference]: With dead ends: 136 [2021-05-02 20:53:04,805 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 20:53:04,805 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:53:04,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 20:53:04,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2021-05-02 20:53:04,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 82 states have (on average 1.146341463414634) internal successors, (94), 84 states have internal predecessors, (94), 34 states have call successors, (34), 18 states have call predecessors, (34), 17 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 20:53:04,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2021-05-02 20:53:04,810 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 79 [2021-05-02 20:53:04,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:04,810 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2021-05-02 20:53:04,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:53:04,810 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2021-05-02 20:53:04,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:53:04,811 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:04,811 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:53:05,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 20:53:05,027 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:05,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:05,027 INFO L82 PathProgramCache]: Analyzing trace with hash 915008698, now seen corresponding path program 2 times [2021-05-02 20:53:05,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:05,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618219393] [2021-05-02 20:53:05,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:05,033 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:05,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543140732] [2021-05-02 20:53:05,033 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 20:53:05,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:53:05,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:53:05,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:53:05,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:05,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-05-02 20:53:05,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:05,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618219393] [2021-05-02 20:53:05,275 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:05,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543140732] [2021-05-02 20:53:05,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543140732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:05,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:05,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:53:05,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341365969] [2021-05-02 20:53:05,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:53:05,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:05,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:53:05,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:53:05,276 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:53:05,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:05,419 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2021-05-02 20:53:05,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:53:05,420 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2021-05-02 20:53:05,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:05,421 INFO L225 Difference]: With dead ends: 139 [2021-05-02 20:53:05,421 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 20:53:05,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:53:05,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 20:53:05,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-05-02 20:53:05,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 84 states have (on average 1.119047619047619) internal successors, (94), 87 states have internal predecessors, (94), 35 states have call successors, (35), 19 states have call predecessors, (35), 18 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 20:53:05,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2021-05-02 20:53:05,438 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 80 [2021-05-02 20:53:05,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:05,438 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2021-05-02 20:53:05,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:53:05,438 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2021-05-02 20:53:05,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 20:53:05,439 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:05,439 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:53:05,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 20:53:05,647 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:05,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:05,647 INFO L82 PathProgramCache]: Analyzing trace with hash -102783885, now seen corresponding path program 1 times [2021-05-02 20:53:05,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:05,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977481735] [2021-05-02 20:53:05,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:05,660 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:05,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167224873] [2021-05-02 20:53:05,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:05,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:53:05,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:05,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:05,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:06,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:06,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:06,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:06,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:06,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:06,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:06,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:06,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:06,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:06,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:06,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,391 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-02 20:53:08,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 72 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-05-02 20:53:08,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:08,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977481735] [2021-05-02 20:53:08,930 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:08,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167224873] [2021-05-02 20:53:08,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167224873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:08,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:08,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:53:08,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742769057] [2021-05-02 20:53:08,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:53:08,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:08,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:53:08,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=230, Unknown=1, NotChecked=0, Total=272 [2021-05-02 20:53:08,931 INFO L87 Difference]: Start difference. First operand 138 states and 161 transitions. Second operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 20:53:11,687 WARN L205 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-02 20:53:11,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:11,761 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2021-05-02 20:53:11,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:53:11,762 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2021-05-02 20:53:11,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:11,763 INFO L225 Difference]: With dead ends: 142 [2021-05-02 20:53:11,763 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 20:53:11,763 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 4753.9ms TimeCoverageRelationStatistics Valid=63, Invalid=356, Unknown=1, NotChecked=0, Total=420 [2021-05-02 20:53:11,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 20:53:11,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-05-02 20:53:11,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 69 states have internal predecessors, (76), 30 states have call successors, (30), 15 states have call predecessors, (30), 14 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 20:53:11,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 134 transitions. [2021-05-02 20:53:11,769 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 134 transitions. Word has length 86 [2021-05-02 20:53:11,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:11,770 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 134 transitions. [2021-05-02 20:53:11,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 20:53:11,770 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 134 transitions. [2021-05-02 20:53:11,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 20:53:11,771 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:11,771 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:53:11,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 20:53:11,985 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:11,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:11,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1101138899, now seen corresponding path program 3 times [2021-05-02 20:53:11,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:11,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711426357] [2021-05-02 20:53:11,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:11,990 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:11,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082659606] [2021-05-02 20:53:11,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:12,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:53:12,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:53:12,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 20:53:12,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:14,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:14,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 82 proven. 8 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-05-02 20:53:14,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:14,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711426357] [2021-05-02 20:53:14,676 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:14,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082659606] [2021-05-02 20:53:14,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082659606] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:14,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:14,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:53:14,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161292160] [2021-05-02 20:53:14,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:53:14,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:14,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:53:14,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=68, Unknown=1, NotChecked=0, Total=90 [2021-05-02 20:53:14,677 INFO L87 Difference]: Start difference. First operand 112 states and 134 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 20:53:37,037 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 20:53:43,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:43,220 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2021-05-02 20:53:43,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:53:43,221 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 89 [2021-05-02 20:53:43,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:43,221 INFO L225 Difference]: With dead ends: 125 [2021-05-02 20:53:43,222 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 20:53:43,222 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 10586.1ms TimeCoverageRelationStatistics Valid=38, Invalid=115, Unknown=3, NotChecked=0, Total=156 [2021-05-02 20:53:43,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 20:53:43,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-05-02 20:53:43,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 77 states have internal predecessors, (83), 32 states have call successors, (32), 17 states have call predecessors, (32), 16 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 20:53:43,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 145 transitions. [2021-05-02 20:53:43,225 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 145 transitions. Word has length 89 [2021-05-02 20:53:43,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:43,226 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 145 transitions. [2021-05-02 20:53:43,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 20:53:43,226 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 145 transitions. [2021-05-02 20:53:43,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 20:53:43,226 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:43,226 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:53:43,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:43,437 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:43,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:43,437 INFO L82 PathProgramCache]: Analyzing trace with hash 632527946, now seen corresponding path program 3 times [2021-05-02 20:53:43,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:43,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199033513] [2021-05-02 20:53:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:43,442 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:43,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494558553] [2021-05-02 20:53:43,443 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 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 20:53:43,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:53:43,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:53:43,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:53:43,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:43,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 42 proven. 33 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-02 20:53:43,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:43,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199033513] [2021-05-02 20:53:43,980 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:43,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494558553] [2021-05-02 20:53:43,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494558553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:43,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:43,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:53:43,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446200936] [2021-05-02 20:53:43,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:53:43,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:43,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:53:43,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:53:43,983 INFO L87 Difference]: Start difference. First operand 123 states and 145 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-02 20:53:44,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:44,391 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2021-05-02 20:53:44,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:53:44,392 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 92 [2021-05-02 20:53:44,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:44,393 INFO L225 Difference]: With dead ends: 143 [2021-05-02 20:53:44,393 INFO L226 Difference]: Without dead ends: 139 [2021-05-02 20:53:44,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:53:44,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-02 20:53:44,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2021-05-02 20:53:44,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 87 states have internal predecessors, (95), 32 states have call successors, (32), 20 states have call predecessors, (32), 19 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 20:53:44,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2021-05-02 20:53:44,397 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 92 [2021-05-02 20:53:44,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:44,397 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2021-05-02 20:53:44,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-02 20:53:44,397 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2021-05-02 20:53:44,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:53:44,398 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:44,398 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:53:44,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 20:53:44,613 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:44,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:44,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1701706771, now seen corresponding path program 4 times [2021-05-02 20:53:44,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:44,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505346242] [2021-05-02 20:53:44,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:44,619 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:44,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079296098] [2021-05-02 20:53:44,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:44,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:53:44,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:53:44,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:53:44,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:44,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:44,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:45,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:45,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 41 proven. 40 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-05-02 20:53:45,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:45,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505346242] [2021-05-02 20:53:45,033 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:45,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079296098] [2021-05-02 20:53:45,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079296098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:45,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:45,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:53:45,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39091535] [2021-05-02 20:53:45,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:53:45,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:45,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:53:45,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:53:45,035 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 20:53:45,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:45,423 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2021-05-02 20:53:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:53:45,424 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 97 [2021-05-02 20:53:45,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:45,425 INFO L225 Difference]: With dead ends: 145 [2021-05-02 20:53:45,425 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 20:53:45,426 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 218.9ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:53:45,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 20:53:45,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-02 20:53:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 92 states have internal predecessors, (100), 34 states have call successors, (34), 21 states have call predecessors, (34), 20 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 20:53:45,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2021-05-02 20:53:45,430 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 97 [2021-05-02 20:53:45,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:45,431 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2021-05-02 20:53:45,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 20:53:45,431 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2021-05-02 20:53:45,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 20:53:45,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:45,432 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:53:45,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 20:53:45,641 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:45,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:45,641 INFO L82 PathProgramCache]: Analyzing trace with hash -317970408, now seen corresponding path program 5 times [2021-05-02 20:53:45,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:45,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340756939] [2021-05-02 20:53:45,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:45,646 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:45,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105982121] [2021-05-02 20:53:45,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:45,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 20:53:45,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:53:45,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 20:53:45,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:45,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:45,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:45,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:45,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:45,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:45,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:45,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:45,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:45,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:45,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:45,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:45,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:46,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:46,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:46,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:46,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:46,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:46,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:46,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:46,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:46,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:46,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:46,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:46,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:46,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:46,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:46,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:46,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 52 proven. 40 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-05-02 20:53:46,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:53:46,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340756939] [2021-05-02 20:53:46,341 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:53:46,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105982121] [2021-05-02 20:53:46,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105982121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:53:46,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:53:46,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:53:46,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381590765] [2021-05-02 20:53:46,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:53:46,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:53:46,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:53:46,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:53:46,343 INFO L87 Difference]: Start difference. First operand 145 states and 166 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 20:53:46,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:53:46,961 INFO L93 Difference]: Finished difference Result 158 states and 183 transitions. [2021-05-02 20:53:46,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:53:46,962 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-02 20:53:46,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:53:46,963 INFO L225 Difference]: With dead ends: 158 [2021-05-02 20:53:46,963 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 20:53:46,964 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 343.9ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:53:46,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 20:53:46,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2021-05-02 20:53:46,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 94 states have (on average 1.1063829787234043) internal successors, (104), 96 states have internal predecessors, (104), 34 states have call successors, (34), 22 states have call predecessors, (34), 21 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 20:53:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2021-05-02 20:53:46,970 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 105 [2021-05-02 20:53:46,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:53:46,970 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2021-05-02 20:53:46,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 20:53:46,970 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2021-05-02 20:53:46,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 20:53:46,972 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:53:46,972 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:53:47,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 20:53:47,189 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:53:47,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:53:47,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1162442279, now seen corresponding path program 1 times [2021-05-02 20:53:47,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:53:47,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916691221] [2021-05-02 20:53:47,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:53:47,198 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:53:47,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544415927] [2021-05-02 20:53:47,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:53:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:53:47,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:53:47,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:53:47,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:47,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:57:01,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916691221] [2021-05-02 20:57:01,592 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:57:01,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544415927] [2021-05-02 20:57:01,592 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-02 20:57:01,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:01,807 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NegativeArraySizeException: -1239324874 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildDualFiniteJunction(DualJunctionTir.java:651) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildCorrespondingFiniteJunctionForAntiDer(DualJunctionTir.java:615) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildBoundConstraint(DualJunctionTir.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateConjuncts(DualJunctionTir.java:205) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne(DualJunctionTir.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryExhaustivelyToEliminate(DualJunctionTir.java:125) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminate(DualJunctionTir.java:112) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:869) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:835) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:753) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:384) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:465) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:612) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-02 20:57:01,812 INFO L168 Benchmark]: Toolchain (without parser) took 243714.50 ms. Allocated memory was 164.6 MB in the beginning and 7.0 GB in the end (delta: 6.9 GB). Free memory was 128.5 MB in the beginning and 6.0 GB in the end (delta: -5.9 GB). Peak memory consumption was 4.5 GB. Max. memory is 8.0 GB. [2021-05-02 20:57:01,812 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 164.6 MB. Free memory is still 145.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:57:01,812 INFO L168 Benchmark]: CACSL2BoogieTranslator took 210.52 ms. Allocated memory is still 164.6 MB. Free memory was 128.3 MB in the beginning and 146.7 MB in the end (delta: -18.4 MB). Peak memory consumption was 11.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:57:01,812 INFO L168 Benchmark]: Boogie Preprocessor took 41.04 ms. Allocated memory is still 164.6 MB. Free memory was 146.7 MB in the beginning and 145.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:57:01,812 INFO L168 Benchmark]: RCFGBuilder took 291.23 ms. Allocated memory is still 164.6 MB. Free memory was 145.2 MB in the beginning and 128.9 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:57:01,812 INFO L168 Benchmark]: IcfgTransformer took 36.47 ms. Allocated memory is still 164.6 MB. Free memory was 128.9 MB in the beginning and 127.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:57:01,812 INFO L168 Benchmark]: TraceAbstraction took 243129.24 ms. Allocated memory was 164.6 MB in the beginning and 7.0 GB in the end (delta: 6.9 GB). Free memory was 127.3 MB in the beginning and 6.0 GB in the end (delta: -5.9 GB). Peak memory consumption was 4.5 GB. Max. memory is 8.0 GB. [2021-05-02 20:57:01,813 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 164.6 MB. Free memory is still 145.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 210.52 ms. Allocated memory is still 164.6 MB. Free memory was 128.3 MB in the beginning and 146.7 MB in the end (delta: -18.4 MB). Peak memory consumption was 11.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.04 ms. Allocated memory is still 164.6 MB. Free memory was 146.7 MB in the beginning and 145.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 291.23 ms. Allocated memory is still 164.6 MB. Free memory was 145.2 MB in the beginning and 128.9 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 36.47 ms. Allocated memory is still 164.6 MB. Free memory was 128.9 MB in the beginning and 127.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 243129.24 ms. Allocated memory was 164.6 MB in the beginning and 7.0 GB in the end (delta: 6.9 GB). Free memory was 127.3 MB in the beginning and 6.0 GB in the end (delta: -5.9 GB). Peak memory consumption was 4.5 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NegativeArraySizeException: -1239324874 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NegativeArraySizeException: -1239324874: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildDualFiniteJunction(DualJunctionTir.java:651) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...