/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/eqn2f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:44:02,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:44:02,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:44:02,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:44:02,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:44:02,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:44:02,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:44:02,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:44:02,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:44:02,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:44:02,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:44:02,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:44:02,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:44:02,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:44:02,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:44:02,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:44:02,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:44:02,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:44:02,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:44:02,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:44:02,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:44:02,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:44:02,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:44:02,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:44:02,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 22:44:02,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 22:44:02,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 22:44:02,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 22:44:02,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 22:44:02,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 22:44:02,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 22:44:02,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 22:44:02,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 22:44:02,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 22:44:02,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 22:44:02,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 22:44:02,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 22:44:02,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 22:44:02,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:44:02,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:44:02,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:44:02,495 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:44:02,547 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:44:02,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:44:02,552 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:44:02,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:44:02,553 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:44:02,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:44:02,553 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:44:02,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:44:02,554 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:44:02,554 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:44:02,555 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:44:02,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:44:02,556 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:44:02,556 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:44:02,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:44:02,556 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:44:02,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:44:02,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:44:02,557 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:44:02,557 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:44:02,557 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:44:02,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:44:02,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:44:02,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:44:02,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:44:02,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:44:02,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:44:02,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:44:02,559 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:44:02,559 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:44:03,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:44:03,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:44:03,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:44:03,083 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:44:03,084 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:44:03,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn2f.c [2020-11-06 22:44:03,164 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/639107f24/79b462b0a3ef478fb0039fcd38e0f090/FLAG461cff96b [2020-11-06 22:44:03,803 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:44:03,804 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn2f.c [2020-11-06 22:44:03,814 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/639107f24/79b462b0a3ef478fb0039fcd38e0f090/FLAG461cff96b [2020-11-06 22:44:04,169 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/639107f24/79b462b0a3ef478fb0039fcd38e0f090 [2020-11-06 22:44:04,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:44:04,182 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:44:04,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:44:04,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:44:04,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:44:04,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:04" (1/1) ... [2020-11-06 22:44:04,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b4047c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:04, skipping insertion in model container [2020-11-06 22:44:04,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:04" (1/1) ... [2020-11-06 22:44:04,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:44:04,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:44:04,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:44:04,499 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:44:04,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:44:04,557 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:44:04,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:04 WrapperNode [2020-11-06 22:44:04,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:44:04,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:44:04,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:44:04,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:44:04,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:04" (1/1) ... [2020-11-06 22:44:04,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:04" (1/1) ... [2020-11-06 22:44:04,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:04" (1/1) ... [2020-11-06 22:44:04,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:04" (1/1) ... [2020-11-06 22:44:04,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:04" (1/1) ... [2020-11-06 22:44:04,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:04" (1/1) ... [2020-11-06 22:44:04,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:04" (1/1) ... [2020-11-06 22:44:04,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:44:04,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:44:04,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:44:04,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:44:04,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:04" (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 [2020-11-06 22:44:04,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:44:04,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:44:04,701 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:44:04,701 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:44:04,702 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:44:04,702 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:44:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:44:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:44:04,702 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:44:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:44:04,703 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:44:04,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:44:04,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:44:04,705 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-06 22:44:04,705 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:44:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-06 22:44:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:44:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:44:04,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:44:04,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:44:04,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:44:04,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:44:05,189 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:44:05,189 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-06 22:44:05,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:05 BoogieIcfgContainer [2020-11-06 22:44:05,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:44:05,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:44:05,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:44:05,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:44:05,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:44:04" (1/3) ... [2020-11-06 22:44:05,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6775832e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:05, skipping insertion in model container [2020-11-06 22:44:05,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:04" (2/3) ... [2020-11-06 22:44:05,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6775832e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:05, skipping insertion in model container [2020-11-06 22:44:05,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:05" (3/3) ... [2020-11-06 22:44:05,201 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn2f.c [2020-11-06 22:44:05,218 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:44:05,222 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:44:05,235 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:44:05,285 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:44:05,285 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:44:05,286 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:44:05,286 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:44:05,286 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:44:05,286 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:44:05,286 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:44:05,287 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:44:05,311 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-11-06 22:44:05,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:44:05,321 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:05,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:05,323 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:05,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:05,333 INFO L82 PathProgramCache]: Analyzing trace with hash -391571351, now seen corresponding path program 1 times [2020-11-06 22:44:05,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:05,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352901090] [2020-11-06 22:44:05,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:05,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:44:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:05,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-06 22:44:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:05,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352901090] [2020-11-06 22:44:05,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:05,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:44:05,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899163541] [2020-11-06 22:44:05,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:44:05,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:05,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:44:05,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:44:05,722 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-11-06 22:44:05,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:05,920 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-11-06 22:44:05,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:44:05,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-11-06 22:44:05,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:05,931 INFO L225 Difference]: With dead ends: 63 [2020-11-06 22:44:05,932 INFO L226 Difference]: Without dead ends: 30 [2020-11-06 22:44:05,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:44:05,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-06 22:44:05,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-06 22:44:05,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-06 22:44:05,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-11-06 22:44:05,983 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2020-11-06 22:44:05,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:05,984 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-11-06 22:44:05,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:44:05,984 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-11-06 22:44:05,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:44:05,985 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:05,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:05,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:44:05,986 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:05,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1402688601, now seen corresponding path program 1 times [2020-11-06 22:44:05,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:05,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421776576] [2020-11-06 22:44:05,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:06,021 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:06,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469155556] [2020-11-06 22:44:06,021 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 [2020-11-06 22:44:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:06,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:44:06,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:06,260 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:06,261 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 39 [2020-11-06 22:44:06,262 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:06,316 INFO L625 ElimStorePlain]: treesize reduction 16, result has 59.0 percent of original size [2020-11-06 22:44:06,329 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:44:06,329 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:7 [2020-11-06 22:44:06,392 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:06,392 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-11-06 22:44:06,394 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-06 22:44:06,419 INFO L625 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-11-06 22:44:06,420 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:44:06,420 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-11-06 22:44:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:06,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421776576] [2020-11-06 22:44:06,499 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:06,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469155556] [2020-11-06 22:44:06,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:06,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-06 22:44:06,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65836368] [2020-11-06 22:44:06,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:44:06,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:06,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:44:06,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:44:06,505 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 7 states. [2020-11-06 22:44:06,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:06,724 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-11-06 22:44:06,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:44:06,725 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-11-06 22:44:06,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:06,729 INFO L225 Difference]: With dead ends: 49 [2020-11-06 22:44:06,729 INFO L226 Difference]: Without dead ends: 46 [2020-11-06 22:44:06,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:44:06,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-06 22:44:06,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-11-06 22:44:06,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-06 22:44:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-11-06 22:44:06,746 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 23 [2020-11-06 22:44:06,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:06,746 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-11-06 22:44:06,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:44:06,747 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-11-06 22:44:06,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-06 22:44:06,748 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:06,748 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-06 22:44:06,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:44:06,963 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:06,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:06,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1243411255, now seen corresponding path program 1 times [2020-11-06 22:44:06,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:06,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760500040] [2020-11-06 22:44:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:06,990 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:06,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078338399] [2020-11-06 22:44:06,992 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 [2020-11-06 22:44:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:07,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-06 22:44:07,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:07,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760500040] [2020-11-06 22:44:07,187 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:07,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078338399] [2020-11-06 22:44:07,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:07,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:44:07,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904449887] [2020-11-06 22:44:07,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:44:07,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:07,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:44:07,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:44:07,191 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 5 states. [2020-11-06 22:44:07,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:07,368 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2020-11-06 22:44:07,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:44:07,369 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-11-06 22:44:07,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:07,372 INFO L225 Difference]: With dead ends: 74 [2020-11-06 22:44:07,373 INFO L226 Difference]: Without dead ends: 60 [2020-11-06 22:44:07,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:44:07,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-06 22:44:07,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2020-11-06 22:44:07,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-06 22:44:07,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-11-06 22:44:07,385 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 25 [2020-11-06 22:44:07,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:07,385 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-11-06 22:44:07,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:44:07,385 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-11-06 22:44:07,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-06 22:44:07,386 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:07,387 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-06 22:44:07,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:07,600 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:07,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:07,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1651516553, now seen corresponding path program 1 times [2020-11-06 22:44:07,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:07,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796672098] [2020-11-06 22:44:07,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:07,625 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:07,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922434544] [2020-11-06 22:44:07,626 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 [2020-11-06 22:44:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:07,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-06 22:44:07,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:07,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796672098] [2020-11-06 22:44:07,787 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:07,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922434544] [2020-11-06 22:44:07,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:44:07,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-06 22:44:07,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90428704] [2020-11-06 22:44:07,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:44:07,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:07,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:44:07,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:44:07,789 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 5 states. [2020-11-06 22:44:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:07,959 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-11-06 22:44:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:44:07,960 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-11-06 22:44:07,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:07,962 INFO L225 Difference]: With dead ends: 69 [2020-11-06 22:44:07,964 INFO L226 Difference]: Without dead ends: 57 [2020-11-06 22:44:07,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:44:07,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-06 22:44:07,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2020-11-06 22:44:07,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-06 22:44:07,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-11-06 22:44:07,984 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 25 [2020-11-06 22:44:07,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:07,987 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-11-06 22:44:07,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:44:07,987 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-11-06 22:44:07,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 22:44:07,988 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:07,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:08,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:08,203 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:08,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:08,204 INFO L82 PathProgramCache]: Analyzing trace with hash 385078571, now seen corresponding path program 1 times [2020-11-06 22:44:08,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:08,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754764018] [2020-11-06 22:44:08,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:08,228 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:08,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305483218] [2020-11-06 22:44:08,229 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 [2020-11-06 22:44:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:08,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-06 22:44:08,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:08,368 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-11-06 22:44:08,370 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:08,382 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:08,391 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-11-06 22:44:08,391 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:08,404 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:08,405 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:44:08,405 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2020-11-06 22:44:08,510 INFO L348 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-11-06 22:44:08,511 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2020-11-06 22:44:08,513 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:08,567 INFO L625 ElimStorePlain]: treesize reduction 27, result has 64.5 percent of original size [2020-11-06 22:44:08,570 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:08,574 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-06 22:44:08,574 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2020-11-06 22:44:08,576 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:08,602 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:08,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:08,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:08,717 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-11-06 22:44:08,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:08,754 INFO L443 ElimStorePlain]: Different costs {12=[|v_#memory_int_15|], 20=[v_prenex_2]} [2020-11-06 22:44:08,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:08,770 INFO L348 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-11-06 22:44:08,770 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2020-11-06 22:44:08,772 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:08,826 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:08,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:08,885 INFO L348 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2020-11-06 22:44:08,886 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 85 [2020-11-06 22:44:08,888 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:09,003 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-11-06 22:44:09,005 INFO L625 ElimStorePlain]: treesize reduction 50, result has 72.2 percent of original size [2020-11-06 22:44:09,014 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-2 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2020-11-06 22:44:09,014 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:115, output treesize:130 [2020-11-06 22:44:09,815 WARN L194 SmtUtils]: Spent 767.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-06 22:44:10,931 WARN L194 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 53 [2020-11-06 22:44:10,938 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:11,012 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-06 22:44:11,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:11,014 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-06 22:44:11,040 INFO L348 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2020-11-06 22:44:11,041 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 47 [2020-11-06 22:44:11,044 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-11-06 22:44:11,044 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:11,048 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:11,088 INFO L348 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2020-11-06 22:44:11,089 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 44 [2020-11-06 22:44:11,091 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-11-06 22:44:11,133 INFO L625 ElimStorePlain]: treesize reduction 27, result has 48.1 percent of original size [2020-11-06 22:44:11,136 INFO L547 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-11-06 22:44:11,136 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:150, output treesize:17 [2020-11-06 22:44:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:11,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754764018] [2020-11-06 22:44:11,229 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:11,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305483218] [2020-11-06 22:44:11,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:44:11,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-11-06 22:44:11,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288208768] [2020-11-06 22:44:11,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-06 22:44:11,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:11,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-06 22:44:11,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:44:11,231 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 10 states. [2020-11-06 22:44:17,520 WARN L194 SmtUtils]: Spent 5.50 s on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-11-06 22:44:23,572 WARN L194 SmtUtils]: Spent 5.97 s on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-11-06 22:44:27,986 WARN L194 SmtUtils]: Spent 4.29 s on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-11-06 22:44:32,512 WARN L194 SmtUtils]: Spent 4.32 s on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-11-06 22:44:32,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:32,962 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2020-11-06 22:44:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:44:32,965 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-11-06 22:44:32,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:32,967 INFO L225 Difference]: With dead ends: 71 [2020-11-06 22:44:32,967 INFO L226 Difference]: Without dead ends: 68 [2020-11-06 22:44:32,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:44:32,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-06 22:44:32,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 47. [2020-11-06 22:44:32,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-06 22:44:32,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-11-06 22:44:32,994 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 27 [2020-11-06 22:44:32,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:32,994 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-11-06 22:44:32,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-06 22:44:32,995 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-11-06 22:44:32,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:44:32,996 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:32,996 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:33,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:33,203 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:33,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:33,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1186077363, now seen corresponding path program 2 times [2020-11-06 22:44:33,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:33,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755619644] [2020-11-06 22:44:33,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:33,260 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:33,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264125355] [2020-11-06 22:44:33,264 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 [2020-11-06 22:44:33,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:44:33,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:44:33,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:44:33,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:33,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755619644] [2020-11-06 22:44:33,460 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:33,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264125355] [2020-11-06 22:44:33,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:44:33,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-06 22:44:33,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040171821] [2020-11-06 22:44:33,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:44:33,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:33,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:44:33,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:44:33,462 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 7 states. [2020-11-06 22:44:33,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:33,786 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2020-11-06 22:44:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:44:33,786 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-11-06 22:44:33,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:33,788 INFO L225 Difference]: With dead ends: 87 [2020-11-06 22:44:33,788 INFO L226 Difference]: Without dead ends: 73 [2020-11-06 22:44:33,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:44:33,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-06 22:44:33,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-11-06 22:44:33,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-06 22:44:33,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-11-06 22:44:33,801 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 29 [2020-11-06 22:44:33,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:33,802 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-11-06 22:44:33,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:44:33,802 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-11-06 22:44:33,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:44:33,803 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:33,803 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:34,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-06 22:44:34,017 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:34,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:34,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1995705613, now seen corresponding path program 3 times [2020-11-06 22:44:34,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:34,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795762673] [2020-11-06 22:44:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:34,038 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:34,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685595570] [2020-11-06 22:44:34,039 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 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 [2020-11-06 22:44:34,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-06 22:44:34,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:44:34,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:44:34,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:34,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795762673] [2020-11-06 22:44:34,183 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:34,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685595570] [2020-11-06 22:44:34,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:44:34,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-06 22:44:34,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958096033] [2020-11-06 22:44:34,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:44:34,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:34,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:44:34,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:44:34,187 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 7 states. [2020-11-06 22:44:34,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:34,493 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2020-11-06 22:44:34,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:44:34,496 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-11-06 22:44:34,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:34,498 INFO L225 Difference]: With dead ends: 82 [2020-11-06 22:44:34,499 INFO L226 Difference]: Without dead ends: 70 [2020-11-06 22:44:34,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:44:34,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-06 22:44:34,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 48. [2020-11-06 22:44:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-06 22:44:34,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-11-06 22:44:34,510 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 29 [2020-11-06 22:44:34,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:34,511 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-11-06 22:44:34,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:44:34,511 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-11-06 22:44:34,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-06 22:44:34,512 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:34,512 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:34,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:34,726 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:34,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1096400111, now seen corresponding path program 1 times [2020-11-06 22:44:34,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:34,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959968627] [2020-11-06 22:44:34,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:34,745 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:34,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1911226553] [2020-11-06 22:44:34,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:44:34,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-06 22:44:34,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:34,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959968627] [2020-11-06 22:44:34,870 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:34,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911226553] [2020-11-06 22:44:34,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:44:34,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:44:34,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046547199] [2020-11-06 22:44:34,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:44:34,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:34,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:44:34,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:44:34,874 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 6 states. [2020-11-06 22:44:35,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:44:35,068 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-11-06 22:44:35,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:44:35,069 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-11-06 22:44:35,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:44:35,070 INFO L225 Difference]: With dead ends: 74 [2020-11-06 22:44:35,070 INFO L226 Difference]: Without dead ends: 51 [2020-11-06 22:44:35,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:44:35,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-06 22:44:35,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-11-06 22:44:35,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-06 22:44:35,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-11-06 22:44:35,081 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 31 [2020-11-06 22:44:35,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:44:35,081 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-11-06 22:44:35,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:44:35,081 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-11-06 22:44:35,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-06 22:44:35,082 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:44:35,082 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:44:35,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:44:35,297 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:44:35,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:44:35,298 INFO L82 PathProgramCache]: Analyzing trace with hash 438283439, now seen corresponding path program 4 times [2020-11-06 22:44:35,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:44:35,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867881675] [2020-11-06 22:44:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:44:35,336 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:44:35,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911471180] [2020-11-06 22:44:35,336 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 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 [2020-11-06 22:44:35,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:44:35,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:44:35,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-06 22:44:35,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:44:35,440 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-11-06 22:44:35,442 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:35,460 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:35,470 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-11-06 22:44:35,471 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:35,489 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:35,490 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:44:35,490 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2020-11-06 22:44:35,667 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-11-06 22:44:35,668 INFO L348 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-11-06 22:44:35,669 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2020-11-06 22:44:35,670 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:35,790 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2020-11-06 22:44:35,791 INFO L625 ElimStorePlain]: treesize reduction 27, result has 64.5 percent of original size [2020-11-06 22:44:35,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:35,795 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-06 22:44:35,796 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2020-11-06 22:44:35,798 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:35,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:35,937 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:36,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:36,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:36,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:36,169 INFO L244 Elim1Store]: Index analysis took 194 ms [2020-11-06 22:44:36,261 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:36,262 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 143 [2020-11-06 22:44:36,264 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-11-06 22:44:36,265 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-06 22:44:36,268 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-11-06 22:44:36,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:44:36,269 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-11-06 22:44:36,269 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:36,275 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:36,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:36,753 WARN L194 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-11-06 22:44:36,755 INFO L348 Elim1Store]: treesize reduction 17, result has 92.5 percent of original size [2020-11-06 22:44:36,756 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 63 treesize of output 252 [2020-11-06 22:44:36,759 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2020-11-06 22:44:36,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-06 22:44:36,760 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-11-06 22:44:36,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-06 22:44:36,762 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-11-06 22:44:36,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-06 22:44:36,763 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-11-06 22:44:36,763 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:44:36,766 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-11-06 22:44:36,767 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:36,782 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:37,394 WARN L194 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 45 [2020-11-06 22:44:37,394 INFO L625 ElimStorePlain]: treesize reduction 797, result has 14.6 percent of original size [2020-11-06 22:44:37,398 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:37,400 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-11-06 22:44:37,400 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:121, output treesize:101 [2020-11-06 22:44:37,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:37,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:37,591 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:37,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:37,869 WARN L194 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-11-06 22:44:37,872 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-11-06 22:44:37,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:37,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:37,917 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-06 22:44:37,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:37,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:37,983 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-06 22:44:38,038 INFO L244 Elim1Store]: Index analysis took 136 ms [2020-11-06 22:44:38,043 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 64 [2020-11-06 22:44:38,044 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:38,068 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-06 22:44:38,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:38,075 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-06 22:44:38,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:38,083 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-06 22:44:38,117 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-06 22:44:38,146 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2020-11-06 22:44:38,147 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:38,163 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-06 22:44:38,164 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-06 22:44:38,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:38,204 INFO L348 Elim1Store]: treesize reduction 17, result has 67.9 percent of original size [2020-11-06 22:44:38,205 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 107 [2020-11-06 22:44:38,206 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:38,563 WARN L194 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-11-06 22:44:38,565 INFO L625 ElimStorePlain]: treesize reduction 70, result has 76.6 percent of original size [2020-11-06 22:44:38,566 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2020-11-06 22:44:38,566 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:212, output treesize:229 [2020-11-06 22:44:38,894 WARN L194 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-06 22:44:38,896 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 6, 1] term [2020-11-06 22:44:38,897 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-11-06 22:44:39,212 WARN L194 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-11-06 22:44:39,215 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-11-06 22:44:39,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:39,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:39,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:39,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:39,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:39,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:39,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:39,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:39,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:39,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:39,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:39,755 INFO L244 Elim1Store]: Index analysis took 436 ms [2020-11-06 22:44:39,785 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:39,785 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 109 [2020-11-06 22:44:39,787 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:39,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:39,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:39,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:39,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:39,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:39,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:40,089 INFO L244 Elim1Store]: Index analysis took 269 ms [2020-11-06 22:44:40,211 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-11-06 22:44:40,212 INFO L348 Elim1Store]: treesize reduction 17, result has 81.7 percent of original size [2020-11-06 22:44:40,212 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 175 [2020-11-06 22:44:40,215 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:40,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:40,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:40,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:40,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:40,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:40,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:40,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:40,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:40,277 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:44:40,277 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 98 [2020-11-06 22:44:40,279 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:40,717 WARN L194 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2020-11-06 22:44:40,718 INFO L625 ElimStorePlain]: treesize reduction 240, result has 52.8 percent of original size [2020-11-06 22:44:40,733 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 10 dim-0 vars, and 3 xjuncts. [2020-11-06 22:44:40,733 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:275, output treesize:269 [2020-11-06 22:44:43,077 WARN L194 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 104 [2020-11-06 22:44:45,778 WARN L194 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 108 [2020-11-06 22:44:45,804 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-11-06 22:44:45,885 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-06 22:44:45,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:45,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:45,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:45,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:45,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:45,909 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-06 22:44:46,055 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-11-06 22:44:46,056 INFO L348 Elim1Store]: treesize reduction 32, result has 64.8 percent of original size [2020-11-06 22:44:46,057 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 94 treesize of output 82 [2020-11-06 22:44:46,060 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-11-06 22:44:46,060 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:46,064 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:46,064 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:46,066 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-11-06 22:44:46,066 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:46,073 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-11-06 22:44:46,074 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:46,081 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-11-06 22:44:46,083 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:46,086 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:46,105 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-06 22:44:46,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:46,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:46,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:46,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:46,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:46,116 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-06 22:44:46,307 WARN L194 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-11-06 22:44:46,308 INFO L348 Elim1Store]: treesize reduction 17, result has 84.0 percent of original size [2020-11-06 22:44:46,309 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 96 treesize of output 113 [2020-11-06 22:44:46,311 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-11-06 22:44:46,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-06 22:44:46,313 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-11-06 22:44:46,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:44:46,314 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-11-06 22:44:46,314 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:46,320 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:46,321 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 3, 1] term [2020-11-06 22:44:46,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:46,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-06 22:44:46,326 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-06 22:44:46,326 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:44:46,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:46,330 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-11-06 22:44:46,331 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:44:46,332 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-11-06 22:44:46,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:46,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:46,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:46,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:44:46,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:46,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:46,341 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 3, 1] term [2020-11-06 22:44:46,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:46,345 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-06 22:44:46,346 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-06 22:44:46,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:44:46,349 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:46,352 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-11-06 22:44:46,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:44:46,354 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-11-06 22:44:46,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:46,356 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:46,379 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-06 22:44:46,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:46,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:46,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:46,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:46,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-06 22:44:46,483 INFO L348 Elim1Store]: treesize reduction 10, result has 81.5 percent of original size [2020-11-06 22:44:46,483 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 82 treesize of output 65 [2020-11-06 22:44:46,485 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-11-06 22:44:46,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:44:46,493 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-06 22:44:46,677 WARN L194 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 27 [2020-11-06 22:44:46,678 INFO L625 ElimStorePlain]: treesize reduction 424, result has 9.2 percent of original size [2020-11-06 22:44:46,686 INFO L547 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:44:46,686 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 13 variables, input treesize:303, output treesize:7 [2020-11-06 22:44:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:44:47,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867881675] [2020-11-06 22:44:47,004 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:44:47,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911471180] [2020-11-06 22:44:47,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:44:47,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-06 22:44:47,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412317023] [2020-11-06 22:44:47,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 22:44:47,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:44:47,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 22:44:47,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:44:47,006 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 13 states. [2020-11-06 22:44:47,742 WARN L194 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2020-11-06 22:44:50,268 WARN L194 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 38 [2020-11-06 22:44:50,830 WARN L194 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-11-06 22:44:55,367 WARN L194 SmtUtils]: Spent 3.84 s on a formula simplification. DAG size of input: 119 DAG size of output: 119 [2020-11-06 22:44:59,045 WARN L194 SmtUtils]: Spent 3.06 s on a formula simplification. DAG size of input: 135 DAG size of output: 135 [2020-11-06 22:45:06,338 WARN L194 SmtUtils]: Spent 5.08 s on a formula simplification. DAG size of input: 137 DAG size of output: 137 [2020-11-06 22:45:11,322 WARN L194 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-11-06 22:45:11,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:11,445 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2020-11-06 22:45:11,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 22:45:11,453 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-11-06 22:45:11,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:11,455 INFO L225 Difference]: With dead ends: 74 [2020-11-06 22:45:11,455 INFO L226 Difference]: Without dead ends: 71 [2020-11-06 22:45:11,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=71, Invalid=347, Unknown=2, NotChecked=0, Total=420 [2020-11-06 22:45:11,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-06 22:45:11,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 55. [2020-11-06 22:45:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-06 22:45:11,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-11-06 22:45:11,469 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 31 [2020-11-06 22:45:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:11,470 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-11-06 22:45:11,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 22:45:11,470 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-11-06 22:45:11,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-06 22:45:11,471 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:11,471 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-11-06 22:45:11,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-06 22:45:11,673 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:11,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:11,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1919081583, now seen corresponding path program 5 times [2020-11-06 22:45:11,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:11,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106580390] [2020-11-06 22:45:11,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:11,700 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:45:11,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016282001] [2020-11-06 22:45:11,701 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 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 [2020-11-06 22:45:11,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-06 22:45:11,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:11,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:45:11,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:11,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106580390] [2020-11-06 22:45:11,882 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:45:11,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016282001] [2020-11-06 22:45:11,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:45:11,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-06 22:45:11,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250588231] [2020-11-06 22:45:11,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:45:11,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:11,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:45:11,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:45:11,884 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 9 states. [2020-11-06 22:45:12,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:12,576 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2020-11-06 22:45:12,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-06 22:45:12,579 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-11-06 22:45:12,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:12,581 INFO L225 Difference]: With dead ends: 103 [2020-11-06 22:45:12,581 INFO L226 Difference]: Without dead ends: 91 [2020-11-06 22:45:12,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:45:12,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-06 22:45:12,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 57. [2020-11-06 22:45:12,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-06 22:45:12,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-11-06 22:45:12,594 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 33 [2020-11-06 22:45:12,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:12,594 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-11-06 22:45:12,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:45:12,594 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-11-06 22:45:12,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-06 22:45:12,596 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:12,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:12,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:12,803 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:12,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:12,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1824151403, now seen corresponding path program 1 times [2020-11-06 22:45:12,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:12,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996349127] [2020-11-06 22:45:12,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:12,817 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:45:12,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875908385] [2020-11-06 22:45:12,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:45:12,952 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:45:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:45:12,981 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:45:13,021 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:45:13,022 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:45:13,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:13,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:45:13 BoogieIcfgContainer [2020-11-06 22:45:13,305 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:45:13,306 INFO L168 Benchmark]: Toolchain (without parser) took 69130.95 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 128.9 MB in the beginning and 70.2 MB in the end (delta: 58.7 MB). Peak memory consumption was 91.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:13,307 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 153.1 MB. Free memory is still 127.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:45:13,307 INFO L168 Benchmark]: CACSL2BoogieTranslator took 373.23 ms. Allocated memory is still 153.1 MB. Free memory was 128.3 MB in the beginning and 118.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:13,309 INFO L168 Benchmark]: Boogie Preprocessor took 43.71 ms. Allocated memory is still 153.1 MB. Free memory was 118.4 MB in the beginning and 116.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:13,310 INFO L168 Benchmark]: RCFGBuilder took 587.03 ms. Allocated memory is still 153.1 MB. Free memory was 116.7 MB in the beginning and 100.2 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:13,317 INFO L168 Benchmark]: TraceAbstraction took 68112.45 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 99.9 MB in the beginning and 70.2 MB in the end (delta: 29.7 MB). Peak memory consumption was 61.8 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:13,318 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 153.1 MB. Free memory is still 127.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 373.23 ms. Allocated memory is still 153.1 MB. Free memory was 128.3 MB in the beginning and 118.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.71 ms. Allocated memory is still 153.1 MB. Free memory was 118.4 MB in the beginning and 116.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 587.03 ms. Allocated memory is still 153.1 MB. Free memory was 116.7 MB in the beginning and 100.2 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 68112.45 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 99.9 MB in the beginning and 70.2 MB in the end (delta: 29.7 MB). Peak memory consumption was 61.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [\old(N)=7, N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 8 [L32] b[0] = 1 [L34] i=1 VAL [\old(N)=0, a={-2:0}, b={-1:0}, i=1, malloc(sizeof(long long)*N)={-2:0}, malloc(sizeof(long long)*N)={-1:0}, N=2] [L34] COND TRUE i